Hawaii Five-0 - Episode Guide

Upon returning to Hawaii to investigate his father's murder, decorated Naval officer Steve McGarrett is recruited by the Governor to head up an elite new police task force - his rules, her backing, no red tape. Their first case involves tracking a weapons dealer connected to McGarrett's father's murder.

Following the violent abduction of an ex-NSA cyber-terrorism expert in the middle of downtown Waikiki, Five-0 must race to rescue the man, and prevent a breach of national security.

When an escalating gang war spills into the stands of the local high school football game, injuring several bystanders and killing a gang leader, Five-0 uncovers an unlikely partnership between Samoan gangs and a mainland mob.

Five-0 is tasked with tracking down a violent convict after he breaks from an Island prison in search of his stolen money and kidnaps a young couple on vacation in Waikiki. Meanwhile, McGarrett's estranged sister, Mary, arrives from the mainland.

When the teenage daughter of the U.S. Ambassador to the Philippines is found dead off the coast of Waikiki, the Governor tasks Five-0 with finding her sister, who was also abducted.

When the CEO of a hugely successful surf company is murdered, Kono revisits her past while Five-0 is thrown headlong into the varied but interconnected worlds of North Shore surfing.

When a Navy SEAL, who's on the run for a murder he swears he didn't commit, takes hostages and safe haven aboard the U.S.S. Missouri memorial battleship, McGarrett must use every SEAL skill in his arsenal to diffuse the situation.

Hawaiian luau turns into a nightmare when the body of a dead cop, who turns out to be Danny's ex-partner from the Honolulu P.D., is found in the barbeque pit. Five-0's dogged investigation into the murder matches them against Internal Affairs, dirty cops and Hawaii's most powerful cocaine cartel.

When a member of the security detail for an upcoming Aid Summit is murdered before he can reveal the details of an assassination plot, Five-0 is brought in to investigate the murder and protect the target, a ruthless dictator.

Five-0 is baffled when a highly skilled ring of thieves pulls off the heist of an armored car, killing two security guards but leaving the money behind. Their only lead in the case requires Danny to reluctantly ask his ex-wife for a favor.

While Five-0 investigates the murder of a man on his honeymoon and his wife's abduction, Medical Examiner Dr. Max Bergman recognizes uncanny similarities to a series of unsolved homicides from a year ago.

It's Christmas in Hawaii, but instead of celebrating, Five-0 is negotiating a hostage situation when the man who killed McGarrett's father resurfaces. The murderer, Victor Hesse, threatens to detonate an explosive that he's strapped around Chin Ho's neck.

When McGarrett's sister is kidnapped and his father's Champ box stolen from his apartment, Steve and Five-0 discover new clues in his mother's murder, including possible ties to the Japanese Yakuza.

Five-0 joins the Honolulu Police Department in a high-speed police chase that ends with the driver fatally injured, and a gruesome discovery by the team. The investigation leads to an awkward reunion between Chin Ho and his ex-fiancé.

Five-0 struggles to stay a step ahead of a major tsunami that has the island evacuating its shores as they investigate the disappearance of the head of the Tsunami Warning Center.

When the sole witness in a high-profile murder case disappears, Five-0 must head into the jungle to locate and protect her from assassins who are closing in fast.

Five-0 is first on the scene when a pirate attack turns an afternoon pleasure cruise into a kidnap-and-ransom nightmare for a group of wealthy spring breakers.

While Five-0 races to stop a mad bomber before he kills again, Danny gets an unexpected visit from his little brother, Matt, a fun-loving, Wall Street broker. The family reunion is cut short, however, when Danny discovers the real reason that Matt is in Hawaii.

Five-0 must unravel the mystery of why a mild-mannered sci-fi fan wearing a cape was given truth serum before being tossed out of a 21st-story window. Meanwhile, McGarrett gets an unexpected visit from a CIA agent who shares his personal interest in tracking down the Yakuza who had his parents killed.

While hiking in a remote area of the jungle to see the famed petroglyphs, McGarrett and Danny instead find a homicide victim. Meanwhile, their aunt's failing health leads Kono and Chin Ho to visit home, where Kono finally learns the truth about the scandal that ended her cousin's career with the Honolulu Police Department.

When a crime lord moves against the family of an undercover NYPD detective who infiltrated his organization, it's up to Five-0 to stop the policeman from exacting revenge.

It's the worst kind of overexposure when world-renowned photographer Renny Sinclair is murdered while on assignment in Hawaii shooting the annual swimsuit edition of a top sports magazine.

With the invaluable information that was shared by Agent Jenna Kaye, Five-0 is closer than ever to capturing Wo Fat. Their mission takes an abrupt turn, however, when Danny is exposed to a lethal neurological agent that presents an even greater threat: bio-terrorism on the island.

When Five-0 gets too close to the truth about Wo Fat and his associates, the criminal mastermind retaliates by trying to destroy the team. They've always played by their own rules, but when the Governor can no longer protect them, it's time for Five-0 to pay the consequences of their actions.

While McGarrett sits in prison awaiting trial for the murder of the governor, Danny brings him a surprise visitor to help clear him. Meanwhile, Kono is suspended for the force, pending an internal investigation.

Gov. Denning assigns Officer Lori Weston to Five-0 to make sure McGarrett and team follow the new rules set by him and also apply her excellent profiling skills to the task force. Meanwhile, as Five-0 investigates the kidnapping of a teenage paddleboard champion, Internal Affairs Capt. Vince Fryer continues his interrogation of Kono.

At his mentor's request, McGarrett persuades Max to redo the autopsy on a SEAL, thought to have committed suicide, in order to investigate his murder. Meanwhile, Chin Ho worries about Kono hanging out with a group of dirty ex-cops, including Frank Delano.

The FIVE-0 take to the beautiful waters off Hawaii to investigate the murder of a deep sea diver known for his valuable shipwreck finds.

The FIVE-0's investigation into the murder of the state's women's volleyball coach leads them to find out more bad news about Kono, and Chin Ho reconnects with his former fiancée, Malia.

The FIVE-0's investigation into the murder of a wealthy restaurant owner causes McGarrett to take part in a charity MMA fight to the finish. Meanwhile, NCIS Agent Kensi Blye lends her expertise to McGarrett and Lt. Commander White when they ask her to examine a video of McGarrett's father.

When the Five-0s investigate the murder of a young couple filming a spooky documentary about a traditional Hawaiian burial site, they are threatened by a drifter who puts a curse on Danny.

Five-0's investigation into the suspicious plane crash and death of a customs agent takes an unexpected turn when it is revealed that the victim was dead before takeoff. Meanwhile, Danny finds himself the proud caretaker of an orphaned dog.

When the Five-0 discover a John Doe in the trunk of a stolen car, they not only have to find a killer, but also need to figure out who the physically-altered victim was. Meanwhile, a homeless Danno is sleeping on McGarrett's couch.

McGarrett finds himself in need of the Five-0's help when he goes to North Korea with Jenna Kaye to deliver a ransom to rebels who are holding her fiancé hostage. Meanwhile, the Five-0 investigate the murder of an investigative reporter who seems to have ties to Jenna.

McGarrett and the Five-0 search for a busload of kidnapped school children as well as the people responsible.

On the eve of Chin Ho's wedding to Malia, the Five-0's investigation into a man left for dead in an abandoned WWII bunker crosses paths with Capt. Fryer's case of a Jane Doe.

When the Five-0 determine that the murder of a teenage girl was a professional hit, they must first find out why she was targeted before they can find her killer.

McGarrett is rocked to his core when Chin Ho tells him some shocking news about Joe White. Meanwhile, Danny plays mid-wife for his ex-wife when she goes into early labor.

A dirty cop from Danny's past comes to the island to exact revenge on Danny and his family for ruining his life, forcing Five-0 team to find a way to help their teammate.

During a fundraiser, the body of a young woman is found. Governor Denning refuses to lock down the hotel, which forces Five-0 to launch a low-key investigation. When the team almost causes an international incident with Russia, the Governor decides that one of the team should be fired. Also, Chin Ho faces the grueling task of choosing a Valentine's Day gift for Malia.

Five-0 investigates the murder of a man dressed as a Hawaiian NaKoa warrior found in the jungle near the site of a historical war reenactment.

Five-0 crosses paths with Tony Archer, a retired NYPD bomb expert who is now a private investigator on Oahu, when they investigate the death of famous talk radio DJ Bobby Raines.

When McGarrett's sister is arrested for trying to smuggle $20 million worth of conflict diamonds, he and Chief Fryer reach out to August March, an ex-con who served 30 years for diamond smuggling, to help arrange a sting operation.

A murder case hits close to home for Max when he is convinced that The Trashman, a serial killer with ties to his past, is on the loose. In order to convince Five-0 of his suspicions, Max reveals shocking information about his childhood.

Five-0 and the NCIS: Los Angeles task force (Special Agents G. Callen and Sam Hanna) team up in Hawaii when there's a suspect on the loose who threatens to release a deadly virus into the population.

Just as McGarrett finally gets his hands on his arch nemesis Wo Fat in a special ops raid, he's blindsided when he finds that the Japanese Yakuza is hot on their trail and wants them both dead.

Five-0 is in hot pursuit of a shooter who guns down one of their own, while another team member is forced to choose which of their kidnapped loved ones will live.

Following McGarrett's mother's surprise return and Chin's gut-wrenching decision in last season's finale cliffhanger, the team is determined to track down Wo Fat and Delano for killing an important member of their family.

McGarrett asks Catherine for her help in locating his mother and the team calls on August March for his assistance when an art heist turns deadly.

McGarrett and Danny's relaxing day at sea takes a deadly turn when their boat is hijacked and they are left to die in the middle of the ocean.

Doris McGarrett pays an unexpected visit to her son while the team investigates the death of a polo player who literally loses his head.

It's Halloween in Hawaii and the clock is ticking when a grisly murder leads the team to a ritualistic killing, and evidence suggests that the killer will soon strike again.

When Danny is forced to remain completely still while bomb technicians disarm a bomb that he has accidentally activated, McGarrett distracts him by getting his partner to tell the story about his toughest and most emotional case from his days as a cop in New Jersey.

While the team investigates the murder of a young computer hacker, McGarrett tries to stage a long-needed reunion between his mother and his sister.

McGarrett plays cat and mouse with a smart and seductive therapist he believes murdered her patient. Meanwhile, Catherine must hunt down one of Doris's old targets who is now seeking revenge.

Max and his crush get put in harm's way when a botched bank robbery leads the team to determine that the criminals had very unexpected motives. Meanwhile, Danny is stuck with the tough task of coming to the rescue of the most beautiful women in the world when a stalker goes after a Victoria's Secret model.

An Aloha Girls camping trip with Grace turns deadly when an armed man takes McGarrett and a little girl hostage. Meanwhile, Adam introduces Kono to his dangerous brother who was recently released from prison.

After someone foolishly tries to carjack McGarrett, he and Catherine meet a boy whose father is missing and may be in deadly trouble in the backwoods of Oahu.

Danny and McGarrett investigate the murder of an Oahu University professor whose body is found decomposing in a tub of acid and his boss, his teaching assistant, and a student who he busted for cheating are all viable suspects.

For the first time in television history, a primetime drama will allow viewers to choose the ending of an episode in real-time when CBS's HAWAII FIVE-0 lets fans vote on CBS.com or Twitter during the East and West coast broadcasts, Monday, January 14, 2013, on the CBS Television Network. 

When Chin is kidnapped in the night and dropped in the middle of Halawa Prison dressed as an inmate, he must fight for his life to escape before the other prisoners recognize him as Five-0.

On the eve of an election, the Governor asks 5-0 to discreetly investigate the murder of a prostitute found in the bed of a missing Congressman. Meanwhile, Danny goes to court to determine if he will get partial custody of Grace.

Five-0 investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list.

Five-0 investigates the murder of a Lua master, and McGarrett hires a private investigator to follow his mother.

It's an All-Pro football weekend in Hawaii and while Danny obsesses about the big game, Five-0 investigates the murder of a tech executive with the help of a star football player.

When a murder victim falls onto Dog the Bounty Hunter's SUV, Five-0 sends Catherine in undercover at the local roller derby to find the culprit.

When threats turn deadly against a tour company that endangers the local shark population, Five-0 faces the difficult task of narrowing down the suspect list. Meanwhile, the team debates whether or not Kamekona will earn his helicopter license.

When McGarrett and Catherine cross into North Korea to retrieve the remains of a fallen friend, he recounts his last deadly mission there.

Five-0 allows a talk show host and her crew to follow them for the day, but the investigation turns dangerous when they have a run-in with Wo Fat.

When the body of a young girl who was kidnapped 10 years earlier is discovered, Five-0 must hunt down the kidnappers who have now taken their next victim. Meanwhile, Kono asks Catherine for a favor that could damage her relationship with Adam.

McGarrett must help his mother execute a covert op to retrieve an incriminating microfiche. Meanwhile, Kono's life is in danger when she closes in on Adam's secret.

As the CIA tasks Five-0 with finding a dangerous killer loose on the island, Kono goes on the run for a murder she did not commit. Meanwhile, McGarrett's prison visit to Wo Fat ends with a shocking discovery.

After McGarrett and Wo Fat narrowly escape from maximum security, gunmen storm Five-0 headquarters, compromising Kono and Adam's secret location in Hong Kong and forcing McGarrett to break the law and turn on his own in order to find a kidnapped Catherine.

Five-0 murder investigation leads the team to help a Texas Ranger who comes to the island to find his missing daughter. Meanwhile, Kono and Adam fight to stay alive when their hidden location is discovered.

Conspiracy theorist helps Five-0 when a missing artifact is the key to solving a double murder.

Five-0 investigates the murder of a wedding crasher, and their prime suspect is the runaway bride. Meanwhile, Danny makes a big decision regarding his relationship with Gabby.

As Catherine's seemingly harmless surveillance job takes a deadly turn, Adam considers making the ultimate sacrifice to save Kono.

When Halloween comes to Hawaii and a zombie-like man is shot, Five-0 races to stop a madman who is conducting experiments on humans.

While working the murder case of an undercover ATF agent, McGarrett and the Five-0 team are tasked with watching Mary's newly adopted baby after she gets sick.

McGarrett and Grover must work together to protect national security after they are tasked by the Governor to serve a warrant to a young computer hacker.

As Thanksgiving approaches, Five -0 investigates the murder of a secret service agent just as the President travels to Oahu. Also, McGarrett's Aunt Deb visits, bringing with her a shocking secret.

The attempted murder of a Pearl Harbor veteran leads Five-0 to use decades old evidence to investigate a deadly crime committed within the internment camps on Oahu during World War II.

Chin's life is put in danger when a murder investigation reveals that the person behind the crime may be a serial killer. Meanwhile, Danny and Grace find a mysterious puzzle box washed up on the shores of Oahu.

McGarrett helps Grover investigate his friend's disappearance after he apparently commits murder. Meanwhile, Kono continues her search for Adam.

Internal Affairs questions Chin about his father's murder 15 years earlier and how his then-new relationship with Malia and her family might have hurt the investigation.

McGarrett and Danny are kidnapped by an escaped convict who wants Five-0 to prove his innocence. Meanwhile, Danny must deal with Grace after she punches someone at school.

While Five-0 investigates the murder of a real estate agent whose body was found in the walls of one of his listings, Danny is thrown when his mother comes to Oahu with shocking news.

Five-0 investigates a triple homicide connected to a downed top-secret Chinese satellite, while Grover takes Danny's mother on a ride-along.

Five-0 aims to uncovers the sordid truth when a girl is taken from her home and her father is shot in the process. Meanwhile, Danny tries to get his parents back together and Jerry deciphers a code he found on the bottom of McGarrett's champ box.

Five-0 investigates when the daughter of a macadamia nut tycoon is murdered with a stiletto heel during Chin's high school reunion.

Five-0 is set up when a bad tip leads them to an abandoned building that is rigged to explode with McGarrett and Danny trapped inside.

The investigation of a murdered pool cleaner leads Five-0 to uncover a possible terrorist cell of radicalized students who are plotting an attack on U.S. soil.

McGarrett and Catherine travel to Afghanistan to stop the Taliban from harming a young boy whose family saved Catherine's life years ago.

When Grover's daughter is kidnapped by an old nemesis, he is forced to help steal $100 million in order to get her back. Meanwhile, Wo Fat escapes prison and heads back to Oahu.

The island of O'ahu goes on lockdown when Five-0 hunts a terrorist who starts using weaponized drones on civilians. Meanwhile, McGarrett and Danno must go for a mandated review with a psychologist, resulting in a session which looks a lot like couples therapy.

Five-0 investigates when the young daughter of a Navy Seal currently on a top-secret mission is kidnapped. Meanwhile, with his brother's life on the line, Danny must locate the $18.5 million he owes his captors.

Five-0 investigates when three female thieves unknowingly steal something during a tour bus robbery that makes them a serious target. Meanwhile, Danny searches for his brother's hidden millions in order to exchange it for his life.

When a Detroit hit man is taken out by one of his colleagues on the streets of Oahu, Five-0 is shocked to learn the killer's surprising motives. Meanwhile, Chin puts his career on the line to help Danny get the money he needs to save his bother's life.

On the fourth anniversary of his father's death, McGarrett meets a woman who helps him reopen the last unsolved case his father worked on before his death.

It's Halloween and Five-0 must track down a serial killer who is copying murders depicted in a cult slasher film. Meanwhile, McGarrett must help Jerry after he is kidnapped by the counterfeiters he has been tracking.

When McGarrett is kidnapped by Wo Fat, he experiences what would have happened to the team if they had taken a very different path.

While the team investigates a couple's murder in which their sons are the prime suspects, McGarrett is shocked when Aunt Deb returns to the island with her new fiancé.

It's Christmas in Hawaii and Five-0 travels to the Big Island, where Max is forced to work with a rival medical examiner after a cowboy is poisoned. Meanwhile, McGarrett pressures Danny into stealing a Christmas tree.

Five-0 enlists the help of an old-school private detective to solve the murder of a young woman who was secretly working as an escort.

When a tourist is killed after unknowingly transporting a stolen Van Gogh, an undercover Kono and Chin enter the world of black market priceless art and are taken hostage. Also, McGarrett asks Iron Chef Masaharu Morimoto to help train Kamekona to beat Chef Sam Choy in a shrimp cook-off.

When a neurosurgeon is assassinated just before performing surgery, Five-0 uncovers the shocking truth behind the disappearance of four reform school boys 40 years ago. Also, McGarrett's Mercury Marquis is stolen by an unlikely culprit.

A patient infected with a contagious and lethal strain of bird flu is kidnapped and the culprits intend to weaponize the virus.

While Five-0 hunts for a notorious criminal who has never been seen, Kono must fight for her life when she discovers the villain's identity. Also, Kono confesses to Adam that she's conflicted about their future together because of his ties to his formerly corrupt family business.

When a journalist is killed, Five-0 must use his past reporting to hunt down a presumed dead Congolese warlord who is alive and well living on Oahu. Also, as Valentine's Day approaches, Danny overreacts when Grace's texts to a boy start accidently coming up on his cell phone.

A California ATF agent helps Five-0 hunt a serial arsonist who is targeting couples on Oahu. Meanwhile, Danny takes Amber on a romantic getaway, but her abusive ex-husband tracks them down with the intent of taking Amber back.

McGarrett and Danny work on their relationship while they stakeout a woman's apartment after she escapes following a diamond robbery.

McGarrett enlists Joe's help after Danny and Chin are arrested for deadly past transgressions.

McGarrett and Odell come under siege in Odell's barbershop when they try to protect a young man who is being hunted down by a gang. Also, Jerry is wrongfully accused of committing a series of home invasions.

When Grover's oldest and closest friend tells him he witnessed his wife fall off a cliff to her death, Grover's gut instinct tells him that this was no accident. Also, Danny and Dr. Shaw get trapped in an elevator with a dead body in need of processing.

When a performer is killed at a convention of Elvis impersonators and his body is stolen, Five-0 must track down the culprits who are after the hidden diamonds sewn into the victim's costume. Also, Gabriel Waincroft returns to ask for Chin for help getting off the island.

When a woman is found murdered in the hotel suite occupied by three married men, Five-0 must help the friends get over their massive hangover and retrace their steps from a wild night to find the killer. Also, Jerry witnesses a woman's kidnapping on the streets of O'ahu.

When Kono goes on a solo outrigger trip around the Hawaiian islands in honor of her mother, she hits a patch of wild weather and must fight to stay alive. As Five-0 searches for Kono, they investigate a man busted for cooking meth who claims he received a threat on his son's life if he didn't continue making the drug.

Five-0 investigates the murder of a bounty hunter who was killed after he apprehended a fugitive. Meanwhile, Rachel reveals a long-held secret to Danny that has serious ramifications.

Season 5 ends with Five-0 learning that a stolen nuclear bomb is somewhere on the island and is about to be detonated. Meanwhile, McGarrett is stunned when Catherine returns to Hawaii; and Chin confronts Adam about his lingering connections to the Yakuza, on the eve of Adam and Kono's wedding.

A murder leads Five-0 to investigate a centuries-old Oahu palace raid involving pirates, buried treasure and a killer who is using a stolen painting as a map. Also, the morning after their wedding, Kono and Adam are threatened and tortured by Gabriel, and Danny shows concern for McGarrett regarding Catherine's return to the island:

Five-0 investigates when a bomb squad is attacked and the culprit threatens to detonate additional hidden explosive devices unless arsonist Jason Sinclair is released from prison. Also, after Adam returns from the hospital, Kono realizes that they are being watched, and McGarrett prepares to take his relationship with Catharine to the next level.

While Five-0 investigates a scuba diver's death from a gun recently used in another murder, McGarrett prepares to propose to Catherine

Five-0 investigates when a wealthy recluse is found dead in a remote field with nearly one million dollars in counterfeit bills. Also, Adam is kidnapped by the Yakuza and forced to torture one of Gabriel's men.

Five-0 must interrogate members of a stunt bikers gang to find a killer who escaped by jumping his motorcycle from one roof onto another. Also, the team prepares to race in a Tough Mudder competition.

It's Halloween in O'ahu, and Five-0 must track down a serial killer inspired by Frankenstein. Also, Jerry calls Five-0 for help when an armed gang raids a blood bank, and Danny must track down Grace who lied and snuck out to a Halloween party

McGarrett's first date with Lynn on a deserted island turns deadly when a mob boss hiding there hunts them down in order to keep his location a secret. Also, Chin, Kono and Grover must race against the game clock to locate the father of a high school football star who will be murdered by a local gambler if his son doesn't throw the big game

Five-0 must work with charming con man Hank Weber to find a killer when his female partner is murdered on the job. Also, San Francisco Police Inspector Abby Dunn comes to O'ahu and works with Chin to investigate the murders of five Chinese arms dealers.

Five-0 goes back to school when a college professor is killed and Danny goes undercover as his replacement

It's fight night on O'ahu! Five-0 investigates when the brother of the promising local boxer is murdered and the prime suspect is the outspoken reigning champion opponent from the mainland.

While McGarrett and Danny attend a couples retreat in Maui to work on their partnership issues, Kamekona's dangerous past comes back to haunt him.

While McGarrett's Aunt Deb visits Oahu on a special personal mission, Five-0 must uncover who stole unstable Japanese WWII bombs left hidden on the island.

While Grover travels to Chicago to finally get a confession from Clay Maxwell about killing his wife, Chin and Kono are held at gunpoint by two killers who have no idea they are cops.

As Five-0 investigates a double homicide involving marital infidelity, McGarrett and the team recount their disastrous Valentine's Day experiences.

While Danny's mother is questioned by the FBI, McGarrett partners with a young man with autism who may have information to help solve the murder of his only friend.

When Five-0's sketchy confidential informant is accused of murder, McGarrett asks his old friend Odell Martin to defend him.

McGarrett and Five-0 must track down a Russian spy who has stolen a flash drive containing classified NSA information that puts the life of a member of their Ohana at risk. Also, McGarrett finally learns why Catherine left him, and Abby continues to conceal her actual mission from Chin and Five-0

When a man is found left for dead drifting off the coast of Oahu, Five-0 uncovers a deadly slave trade operating aboard an illegal fishing vessel. Also, while Danny is out with his children, his car is stolen so he commandeers a bus to chase down the thieves.

A case from 15 years ago forces Grover to take his family on the run when a dangerous mob boss tracks him down to seek revenge.

While Five-0 investigates the theft of a high tech, indestructible suit built for the U.S. military, Jerry helps his sister try to save a captive elephant.

Five-0 goes on a manhunt when a chemical spill permits six dangerous inmates to escape, including Kono's husband, Adam.

Five-0 tries to save a kidnapped college student from a dangerous vigilante. Meanwhile, Max, Kamekona and Flippa fight to survive after being shipwrecked.

When a woman is murdered in her home, Five-0 learns that one of their own has a deep connection to the victim's young daughter.

Trapped inside a dilapidated building in Oahu's Chinatown, Five-0 must protect a wounded Gabriel and plan their escape when enemy gunmen storm the building looking to kill him and anyone who gets in their way.

In order to stop a meth epidemic on the Island, McGarrett and Danny go undercover as pilots, but when McGarrett is seriously wounded, Danny is forced to break their cover in order to save his partner's life.

McGarrett refuses to listen to Danny's pleas to take it easy while recovering from surgery; Five-0 goes on the hunt for a serial killer as fear grows that it's not safe to travel to Hawaii.

Five-0 must work with rogue MI-6 agent Harry Langford to find a terrorist planning to cause nuclear reactors across Europe to meltdown. Also, McGarrett and Danny ask retired FBI profiler Alicia Brown to help them find their serial killer vigilante.

FBI profiler Alicia Brown is forced to join McGarrett in the hunt for the chess-piece killer when she finds a body in her bed. Meanwhile, Kono reconnects with a former surfing competitor who is now a disabled and homeless war veteran.

Five-0 must find McGarrett and Alicia when they are kidnapped by the serial killer they've been hunting.

When a cache of guns is stolen from a gun range, Five-0 discovers the culprit is intent on making a dramatic statement on gun violence.

On Halloween, Five-0 investigates the murder of a medium with a checkered past who was apparently scared to death by a poltergeist. Also, Kono and Adam are kidnapped by what appears to be a death cult.

Catherine informs Five-0 that McGarrett's mother has been captured and is in danger of being executed for trying to free Wo Fat's imprisoned father; Also, Chin loses his appeal to have Sara's adoption delayed, and she must move to Mexico.

While Danny chaperones Grace's winter formal, terrorists seize the venue and hold everyone hostage in order to kidnap a diplomat's son. Also, Danny and Grover are shocked to learn that Will is Grace's secret boyfriend.

When a conspiracy theorist with compelling evidence that JFK's cabinet ordered his assassination is murdered, Five-0 investigate's one of history's most notorious unsolved mysteries.

Five-0 investigates the 10-year-old cold case of a missing teen when a boy suffering from PTSD undergoes hypnosis and realizes he may have witnessed her murder. Also, Danny's sister Bridget visits Oahu for a business conference, and he suspects that she may be getting too close to a co-worker.

Five-0 races to Mexico where Chin puts his life on the line after his niece Sara is kidnapped.

Chin is kidnapped by a cartel in Mexico and Five-0 races to rescue him before he is executed by his vengeful abductors. Meanwhile, Grover goes undercover as a car salesman to investigate a murder that turns out to be far more complex and dangerous than expected.

As Max prepares to say goodbye to his Five-0 ohana, they must investigate a murder during a police convention on the island.

The team faces a contentious U.S. Marshal after a murder suspect escapes capture and looks for asylum in the sovereign land that belongs to the Nation of Hawaii.

When working a murder case involving the illegal practice of shark finning, Five-0 uncovers the possibility that a former Nazi war criminal may be hiding out in an old leprosy colony in Hawaii.

While McGarrett and Danno celebrate Valentine's Day with their girlfriends, the rest of Five-0 investigates the murder of a man taking a class on how to land women.

McGarrett and Five-0 once again become entangled in the twisted mind games of serial killer Dr. Madison Gray when she stumbles into HPD covered in blood that matches Alicia Brown's, and claims amnesia.

McGarrett and Danny finally track down the missing uranium, which has been used to build a bomb located in the middle of the jungle. Now, they must carefully extract the unstable explosive through treacherous terrain before it detonates.

McGarrett and Kono suspect that an abused young girl may be the victim of a sex trafficking ring on the Island. Also, Chin and Grover investigate a murder at a sober living facility.

Five-0 helps PI Harry Brown work the case of a kidnapped wealthy woman whose husband may have something to hide. Also, Rachel tells Danny that she is getting a divorce from Stan.

McGarrett and Five-0 are captured and face certain death after tracking a dangerous nemesis to the Island of Lanai. Also, Grover takes his son to Chicago where he testifies against a dirty cop from his past.

While working the murder case of one of the last survivors of the USS Arizona, McGarrett learns about his grandfather's important role at Pearl Harbor. Also, Adam uncovers bone fragments at his new construction job and asks Jerry to help him discreetly investigate.

Danny protects a coma patient showing signs of waking who was the key witness from his last HPD case before he met Steve and joined Five-0.

When McGarrett gets a tip that someone is plotting a terrorist attack on Oahu, Five-0 searches for those behind it before it's too late. Also, Chin and Abby have a very difficult decision to make.

McGarrett risks his life when Five-0 attempts their most dangerous rescue yet of young girls trapped in the sex trafficking ring they have been tracking this year. Also, Kono, deeply affected by the case, makes a life-changing decision.

McGarrett and Danny recruit Tani Rey to join the task force when diabolical hacker Aaron Wright releases a dangerous arsonist from prison.

McGarrett and Five-0 work with an injured police dog who is the only witness to an ambushed drug bust. Also, McGarrett is visited by Junior Reigns, a former SEAL, who is looking to join the task force.

Five-0 enlists the help of an old friend when the boss of a major crime family is murdered, triggering revenge killings across the island. Also, MacGarrett and Danny begin sorting out particulars in their new restaurant venture.

The lives of Five-0's informants are in danger when the HPD system is hacked and one ends up dead, forcing McGarrett to enlist the help of hacker Aaron Wright, who he just imprisoned.

At Halloween, Five-0 must investigate a string of murders that mirror stories from well-known Hawaiian folklore. Also, Grover is called to visit a man hours away from execution who may hold the key to a case that has plagued Grover for years.

The murder of two tourists leads Five-0 to a man suffering from multiple personality disorder, where one of them becomes violent and another is a child. McGarrett is accompanied on the case by a stress management consultant, whom Danny and the others have hired to help him manage his health.

Junior and Adam back up McGarrett when a bank heist in progress forces Steve to make a potentially heartbreaking mistake. Also, Adam is forced to face an empty home without Kono.

McGarrett poses as a pilot to investigate the cause of a plane crash that led to the death of a pilot in an air race.

When investigating a deserted yacht adrift at sea, McGarrett, Danny, Tani, and Junior are exposed to a deadly bioweapon and the rest of Five-0 have only eight hours to find an antidote.

When Danny is shot while quarantined in the hospital with McGarrett, Tani, and Junior, he's left unconscious and clinging to life, imagining a future for everyone in Five-0.

It's Christmas Eve and Danny tells Charlie a bedtime story about a recent Five-0 case involving criminals dressed as Santas and a holiday miracle.

When an FBI agent who was cracking down on organized crime is killed, McGarrett rounds up every gang-related criminal on the island to find the culprit. Also, McGarrett tasks Adam with forming a new division within Five-0 to take on organized crime.

When a man accused of killing his wife threatens to commit suicide, Grover reveals how he too was once on the brink of taking his own life.

When the corpse of a diamond smuggler is stolen from a graveyard, Five-0 tracks down his partner, Voss, who will stop at nothing to retrieve their latest batch of contraband. Also, Adam recruits a new confidential informant, Jessie Nomura; Tani gets a devastating call; and McGarrett tasks Pua to find his and Danny's stolen tools.

McGarrett and Danny investigate the murder of a private detective whose client was killed the same way, and Adam sends Jessie into a dangerous situation with disastrous consequences. Also, Danny's uncle, Vito, comes to town to help Danny and McGarrett get their restaurant up and running.

Tani and Junior go undercover as prospective parents in order to infiltrate a private school where the headmaster was murdered. Also, Adam's life is on the line when he is held captive and forced to produce a hidden massive amount of money.

Adam's mission to take down organized crime on the Island goes sideways when deadly chlorine gas he was using to bait a big fish falls into the wrong hands. Also, Adam begins to doubt Jessie's allegiance.

The ex-wife of the man who shot Danny comes to Oahu and reveals how Danny's protection during a dangerous domestic dispute when he was in New Jersey helped save her life. Also, Tani and Junior are assigned to walk the beat as uniformed officers for the day, and Adam is framed for the murder of the crime boss he has been tracking.

A hitman, Leroy Davis, McGarrett's father failed to arrest comes to McGarrett to finally confess his crimes and admit where he buried his victims. Also, Jessie makes a dangerous decision that could ruin Adam's life.

Catherine Rollins recruits McGarrett and Jerry to help her track down a uranium deposit thought to be hidden on an abandoned Hawaiian island before a suspected terrorist can make dirty bombs with it. Also, when Junior falls and is trapped in a ravine, he reflects on his estranged relationship with his father.

Harry Langford enlists McGarrett and Danny's help to track down Lady Sophie, a teenage British royal who has run away while under his protection. Also, Grover, Tani and Junior work a 25-year-old murder case after a mysterious Betamax tape arrives at 5-0 headquarters.

Five-0 must help Duke after he is forced to steal crucial evidence from the police locker in exchange for his kidnapped granddaughter. Also, Jerry goes undercover at a mental health facility in order to solve a murder.

McGarrett and Five-0 take on the mob when a former boss is killed and Junior's friend Cammy Lin is on the run after witnessing the hit.

McGarrett joins Junior and his SEAL Team on a high risk covert mission to capture an elusive target who is holding his mentor, Joe White, hostage. Also, Gerard Hirsch and Kamekona help Grover and Tani on a murder case involving masterpieces stolen by the Nazis during WWII and Tani makes a shocking discovery.

McGarrett and Five-0 discover a Russian spy ring hiding in plain site on Oahu when a Russian nuclear attack submarine appears on the coast of Waikiki. Also, Tani is conflicted by her unnerving discovery at Adam's house.

After Steve's CIA agent friend is killed, McGarrett lets himself be captured by the group he thinks is responsible and endures a torturous sensory deprivation tank to find the killer. Also, Tani wrestles with whether or not she will tell McGarrett about the murder weapon she found at Adam's house.

When a vacationing dad on a flight to Honolulu is kidnapped and forced to parachute mid-flight, Danny, Tani, and Junior track him through the jungle to discover that he may not be who he seems. Also, McGarrett is threatened with a secret from his past.

Crime spikes when a heat wave hits Oahu, causing McGarrett and Danny to hunt down a bank thief, and Tani and Junior's car is stolen while they're on duty. Also, Grover plays the golf game of a lifetime, and Kamekona incites a riot by price-gouging on his shave ice.

Jerry accompanies Junior as he escorts a fallen soldier home to Oahu. Also, McGarrett and Danny discover a dead body when they delve into the illegal and highly profitable black market for sand.

On Halloween, Jerry and his friends search his childhood camp for evidence to a murder he witnessed as a boy, while McGarrett investigates a little girl who drew pictures depicting the scene of a recent murder before it was discovered.

McGarrett crosses the line and is arrested while investigating the death of his former SEAL buddy, who died while making an emergency landing on an aircraft carrier, and the only survivor is a baby. Also, Adam returns to Oahu with some devastating news about his marriage.

McGarrett investigates a cold case from the 1940s, one that his grandfather and the famous Honolulu detective Chang Apana worked on, and he tries to deduce how the case could have been solved. Also, McGarrett and Danny get ready for the opening of their restaurant.

Thanksgiving brings Grover's parents and brother Percy, Jr. to Oahu for a visit tainted by sibling rivalry, and Five-0 investigates a thief who is crushed to death by an empty safe.

A renowned urban vigilante is killed after making another citizen's arrest, and Five-0 delves into the world of super heroes and comic books to find the killer. Also, Adam finally gets closer to finding out who killed his sister.

After fighting off an assassin in his own home, McGarrett and Joe White flee to Montana to prepare for a battle against those exacting revenge for a past SEAL mission.

Still reeling from the murder of one of their ohana, Steve and Catherine, along with Danny, Junior and some old friends, Harry Langford and Wade Gutches, hunt down the killer. Also, Tani and Grover investigate when a bag of human bones, discovered inside an abandoned storage locker goes missing.

MacGarrett and Five-0 support Danny and Rachel by determining what happened when Grace gets into a life-threatening car accident and lands in critical condition. Also, Tani helps Koa when his rehab patient goes missing,

Adam, Junior and Tani travel to the bottom of the Pacific Ocean when a murder takes place in a remote underwater lab, and the killer may still be on board.

While investigating Flippa's friend's murder, McGarrett and Grover uncover a deadly plan by an extremist group on the Island. Also, Grover has an emotional reaction to the case.

As a dangerous hurricane hits Oahu, Five-0 is tasked with protecting El Diablo, a captured serial killer who is being hunted by an assassin. Also, Tani's civilian safety check during the storm turns deadly and Rachel and Charlie evacuate to Danny's house, where the ex-spouses reminisce.

When the top salesperson for a beauty company/pyramid scheme is murdered, Five-0 sifts through a long list of possible suspects who would want her dead. Also, Adam befriends a homeless man estranged from his family.

Junior is torn between his duties as a member of Five-0 and his feelings for his former girlfriend when her new love, the father of her son, is one of the culprits in a bank-heist-turned-homicide.

Tani and Junior go undercover at a gym to track down a deadly batch of steroids that's killing users, before the drugs claim any more victims. Also, Danny and MacGarrett sub as bodyguards for Danny's high maintenance ex-mother-in-law, Amanda Savage, a wildly famous romance novelist with whom he has never gotten along.

Five-0 investigate the murder of a window washer and find that the victim is actually a renowned street artist who may have a politically motivated bounty on his head. Also, Grover and Adam look into the murder of a gambler, and Junior helps his father when they are reminded of his sister's death.

Five-0 must locate a teen girl who purchased a gun from a junkie, and discover that the firearm, over the course of decades, has affected all of their lives.

Five-0 investigates the murder of a man whose body may hold the key to a 20-year-old case involving a kidnapped girl whose father never stopped looking for her.

While Adam investigates the murder of an undercover FBI agent about to wed the daughter of a Yakuza leader, Noelani is held hostage and forced, along with her mentor Dr. Chu, to operate at gunpoint on a criminal.

While McGarrett helps his visiting sister, Mary, spy on her shady neighbors, Five-0 investigates the murders of a ride-share driver and his passenger. Also, the team teases the youngest members of Five-0 when Junior escorts Tani to a wedding.

Fugitive hacker Aaron Wright resurfaces to ask Five-0 for help when his co-workers at the NSA, which he has been working for, are all murdered. Also, Junior speaks at the parole hearing of the drunk driver who killed his sister.

Five-0 continues to hunt down escaped criminal Aaron Wright before he can sell cyber-weapons to the highest bidder. Also, the lives of McGarrett and the team are put in danger when a visitor comes to headquarters to make amends.

A new ally helps McGarrett and Five-0 when mob bosses on the island are being targeted by an assassin. Also, Five-0 says goodbye to one of their own.

Tani and Junior must plot an escape for themselves and several civilians after they become trapped inside a deadly tunnel collapse, while Five-0 investigates the cause and culprits of the cave-in. Also, Eddie the dog uses his field experience and sniffs out a bomb that has been planted in McGarrett's home.

Five-0 investigates when a plane that mysteriously crashed into the Pacific in the ‘80s is found, but with a recently murdered scuba diver inside. Also, as MacGarrett and Quinn zero in on who planted the bomb in his garage, and he formally asks her to join Five-0, she is arrested for money laundering.

Five-0 enlists imprisoned hacker Aaron Wright to help when a young girl is reported kidnapped, but upon rescue, the culprits are dead, the girl is safe, and she's not who she claims to be.

It's Halloween and Five-0 investigates a home invasion turned deadly after a dangerous "monster" escapes from the basement. Also, Max returns to Oahu with a very special guest.

McGarrett and the team investigate when a deadly hit-and-run involves a driverless car carrying heroin, and what could be a new means for delivering drugs. Also, Tani and Quinn are stuck with a pair of YouTubers who are brought on a ride-along with Five-0.

When the CIA informs McGarrett that his mother has gone rogue on her undercover mission and may have killed her partner, Steve goes solo to Mexico to bring her home and prove her innocence.

Five-0 teams up with a DEA agent to search for a killer whose plane crashed in the jungle with $10 million worth of heroin on board. Also, Grover is thrilled when his niece Siobhan comes to try out for the University of Hawaii basketball team.

It's Thanksgiving, and while Junior and Tani track down the thief who robbed his parents' home, Five-0 investigates the murder of a beloved philanthropist and the theft of his ultra-valuable koa tree. Also, Danny moves in with McGarrett.

When Adam's girlfriend, Tamiko, is kidnapped right in front of him, he shuts out Five-0 and breaks all the rules in order to get her back. Also, Five-0 investigates three seemingly unconnected homicides.

When Five-0 investigates a tourist helicopter that was shot down by a missile, they trace the stolen artillery to a ghost from McGarrett's past – Wo Fat. Also, after Adam's ordeal in rescuing Tamiko and reconnecting with the Yakuza, he makes a bold decision about his future with Five-0.

When a list of undercover CIA agents is stolen, Steve and Five-0 enlist the help of Magnum, Higgins, Rick and TC to get it back and protect national security. Also, Higgins gives Tani some personal advice.

Grover and Five-0 investigate a murder at a private golf course involving a man who was frozen to death in the locker room's cryo-chamber. Also, McGarrett tags along with Danny when he tracks down the father of a boy who has been bullying Charlie.

Soon after Danny meets the girl of his dreams, they get into a potentially fatal car accident in an area far from help. Also, McGarrett enlists Quinn and Tani to help when Eddie the dog suddenly shows signs of PTSD.

When Grover's niece, Siobhan, goes missing from the police academy and it's discovered her boyfriend is an undercover member of the Yakuza, Adam may be her only hope of rescue.

On Valentine's Day, Tani and Noelani are held hostage during a convenience store robbery. Also, Five-0 investigates the murder of a Thai diplomat whose wife confesses to the crime, but Danny suspects she's covering for the real killer.

Harry Langford helps Five-0 investigate a series of murders that follow the plot of a fabled unpublished crime novel from the 1920s. Also, Tani and Junior's friendship takes a meaningful new turn.

While Five-0 investigates a murder on a cargo ship where pirates impersonated the Coast Guard to board the boat, Adam finally gets the evidence he needs to take down the Island's Yakuza operation once and for all. Also, Quinn helps Noelani when she suspects that her uncle didn't die of natural causes.

Five-0 investigates when a rancher is murdered after he uncovers human skeletons on his property where legend says that Civil War-era gold coins were buried. Also, Quinn's former stepdaughter, Olivia, reaches out to her for help after her father doesn't come home.

While Five-0 investigates a scheme to rob tourists, Tani helps Girard Hirsh prove the innocence of his elderly uncle when he's suspected of murder. Also, Tani and Junior work on the nuances of being in a new relationship.

After Steve receives a posthumous letter from his mother that contains a cypher, Danny is attacked by someone willing to kill to steal it. Also, Five-0 must help Lincoln Cole (Lance Gross), an anonymous good Samaritan who's in the crosshairs of some very dangerous people.

Danny is abducted and badly wounded by Wo Fat's wife, who is after the cypher Steve's mother left him. Also, Steve finally solves the case his father left for him 10 years ago, on the series finale of HAWAII FIVE-0, which concludes its successful 10-season run.

Alternative Ending #1 of 3x12 Episode. The first alternative ending from "Your Vote - Your Ending". In this ending the murderer is Bram Helms, the Technical Assistant of the victim

Alternative Ending #2 of 3x12 Episode. The second alternative ending from "Your Vote - Your Ending". In this ending the murderer is Tyler Brown, a student of the victim