Sleeper Cells
Episode: 1x01 | Airdate: Jul 1, 2009
Parasitic worms eat the brain of an 11-month-old; a war veteran has a parasite that has lived in him for the past 36 years; a man has a parasite living in his brain.
Episode: 1x01 | Airdate: Jul 1, 2009
Parasitic worms eat the brain of an 11-month-old; a war veteran has a parasite that has lived in him for the past 36 years; a man has a parasite living in his brain.
Episode: 1x02 | Airdate: Jul 8, 2009
A group of students return from a tropical vacation only to discover there are worms inside their brains; a water-borne parasite causes the worst parasitic outbreak in U.S. history; a man and several others have a parasite that isn't endemic to their state.
Episode: 1x03 | Airdate: Jul 15, 2009
A man has something growing in his head; a chemical worker discovers parasites in his lungs; a woman is horrified to find she picked up some stowaways from a hotel.
Episode: 1x04 | Airdate: Jul 22, 2009
A parasite eats away at a teenage girl's eyeball; a man picks up a parasite as a young child, but only 60 years later does it become a problem; a runner is attacked by a tick-borne parasite.
Episode: 1x05 | Airdate: Jul 29, 2009
A four-year-old boy has parasites invading his eye; a day at the lake turns into a nightmare when a ruthless brain-eating monster attacks the brain of a young boy; a man travels to Africa and picks up a stowaway that attacks his blood.
Episode: 1x06 | Airdate: Aug 5, 2009
A woman battles an invincible brain-eating monster; a farmer does battle with a parasite that cannot be killed; a banker is infected with the deadliest parasite on the planet.
Episode: 2x01 | Airdate: Jun 9, 2010
Parasites stop a fit and active dance instructor in her tracks; a man deals with parasites in his brain; a scientist picks up parasites from a trip to Africa.
Episode: 2x02 | Airdate: Jun 16, 2010
A monster attacks the liver of a schoolteacher; a dancer is left debilitated by parasites; a man develops an itch that drives him crazy.
Episode: 2x03 | Airdate: Jun 23, 2010
A nine-year-old boy slips into a coma after a deadly brain-eating monster attacks; a computer programmer is infected with the deadliest parasite on the planet; a marathon runner has an enlarged spleen from parasites.
Episode: 2x04 | Airdate: Jul 7, 2010
A three-year-old girl suffers severe vomiting, diarrhea, and weight loss after she is infected by a parasite; a firefighter battles for his life after a mysterious monster begins devouring his brain; a teenage girl has parasites attacking her retinas.
Episode: 2x05 | Airdate: Jul 14, 2010
A college student gets a wound that won't heal; a cat scratch leaves a woman with a parasitic monster; a couple get mysterious rashes that come and go.
Episode: 2x06 | Airdate: Jul 28, 2010
An exotic meal leaves a carpenter fighting for his life; an athletic woman discovers she has parasites in her bladder; a war veteran is horrified to discover worms are living inside him.
Episode: 2x07 | Airdate: Aug 4, 2010
A teenage boy is left fighting for his sight when something invades his eye; a man deals with a parasite that he's had for the past 30 years; a young schoolgirl suffers from debilitating stomach cramps.
Episode: 2x08 | Airdate: Aug 11, 2010
A traveler's nosebleeds have a disgusting cause behind it; a man considers deliberately infecting himself with a parasitic worm to cure his allergies: a 6-year-old girl has a parasite in her foot.
Episode: 2x09 | Airdate: Aug 18, 2010
A caregiver is attacked by a blood-eating parasite, and his lack of a spleen makes it worse; a woman fights a parasitic worm traveling throughout her body; an older woman fights for her life when parasites attack her intestines.
Episode: 2x10 | Airdate: Aug 25, 2010
A 7-year-old suffers a horrific seizure as the result of a parasite being in her brain for many years; a machinist fights a parasitic worm threatening to take his sight; a parasite attacks a team of doctors.
Episode: 3x01 | Airdate: Oct 5, 2012
A mother is left shocked when her daughter loses her appetite but then suddenly develops cravings for salt and cat food; a man suffers a damaged colon from a common bacteria; a traveling couple are left fighting an age-old killer.
Episode: 3x02 | Airdate: Oct 12, 2012
A teenage boy is attacked by a disease that's causing his flesh on his face to rot; an intruder drives a model/actress to the brink of suicide; a college student finds herself struggling for every breath.
Episode: 3x03 | Airdate: Oct 19, 2012
A man travels to South America with his girlfriend, but picks up a flesh-eating souvenir along the way; a man develops severe back pains before the cause is discovered; a promising athlete is sidelined by a mysterious infection.
Episode: 3x04 | Airdate: Oct 26, 2012
An unusual intruder causes a newlywed woman's mental state to deteriorate; a young boy may lose his life when an infection causes his muscles to break down; an infection causes a plumber to lose 50 lbs.
Episode: 3x05 | Airdate: Nov 2, 2012
A teenage girl has an intruder in her hand; a man tries desperately to eviscerate a can tab he accidentally swallowed; parasitic worms attack the brain of an otherwise healthy man.
Episode: 3x06 | Airdate: Nov 9, 2012
A pregnant woman is attacked by a monster that threatens the life of her unborn baby; an elderly man has something in his lungs that stumps doctors; a truck driver is blindsided by a parasite.
Episode: 3x07 | Airdate: Nov 16, 2012
A pregnant woman slips into a coma when a horrifying intruder invades her body; a woman is left in shock when she coughs up live worms; a teenage girl suffers a chain of symptoms and doctors are unable to figure what's causing them.
Episode: 3x08 | Airdate: Nov 23, 2012
A baby swallows a common everyday object that burns a hole in his esophagus; a university student has a mysterious intruder in her brain; a young woman is put in a battle with a tropical disease.
Episode: 3x09 | Airdate: Nov 30, 2012
A two-year-old does battle with a deadly infection; a man has surgery to remove a tumor from his back, but the doctors accidentally leave something inside him; a 7-year-old baseball star suffers horrifying seizures that leave his parents traumatized.
Episode: 3x10 | Airdate: Dec 7, 2012
Doctors discover an infection that is shutting down the organs of a young man; a teenage girl searches endlessly for a diagnosis to her mysterious chronic disease; a woman is shocked to find something is inside her breasts.
Episode: 4x01 | Airdate: Sep 30, 2013
A 7-year-old girl fights a centuries-old disease; a yoga instructor discovers what she thought was influenza is actually a flesh-eating disease; a state-wrestling champion travels abroad but picks up a deadly disease while there.
Episode: 4x02 | Airdate: Oct 7, 2013
A 2-year-old boy swallows something horrific; a teenage ballerina suffers debilitating migraines from an infection; a preacher thinks he has a worm in his eye.
Episode: 4x03 | Airdate: Oct 11, 2013
A deadly infection puts a man through organ failure; an 8-year-old girl is infected with a disease that kills almost all it infects; a college student has something devouring his eyeball.
Episode: 4x04 | Airdate: Oct 18, 2013
A two-year-old girl has a mysterious lump on her neck; a mother-of-two is plagued by nausea and stomach cramps for four years before finally discovering what's wrong; a 5-year-old boy writhes in pain when his own body sends immune cells to attack itself.
Episode: 4x05 | Airdate: Oct 25, 2013
A young boy's summer vacation grinds to a halt when a deadly monster attacks; a man suffers bizarre hallucinations before being hospitalized; a former beauty queen suffers an extreme case of asthma.
Episode: 4x06 | Airdate: Dec 11, 2013
A woman travels to Burkina Faso only to fall ill when a parasite strikes; a deadly infection threatens to suffocate a young mother; a baby boy has roundworms eating his brain.
Episode: 4x07 | Airdate: Dec 11, 2013
A teenage boy survives being sucked into a tornado, but his trauma wounds become the open door for a deadly fungus that threatens to take his life; a young couple travel to Africa only to get ugly spots on their skin; brain lesions cause a man to have violent outbursts.
Episode: 4x08 | Airdate: Dec 18, 2013
A teenage boy accidentally swallows a dangerous foreign object; brain-eating monsters present a teenage girl with encephalitis; an industrial painter struggles to breathe and walk when intruders invade his body.
Episode: 4x09 | Airdate: Dec 18, 2013
A young couple return home for the holidays to discover a monster has joined them on the trip home; a man's crippling back pains leave him hospitalized; a young woman struggles to breathe after she is infected with a deadly fungus.
Episode: 4x10 | Airdate: Dec 18, 2013
A newborn baby has a parasite that's eating at his brain, leaving him blind; a young boy has a mysterious brain infection; a part-time contractor has parasites in his lungs.
Episode: 5x01 | Airdate: Oct 9, 2014
Teenage girl in Tennessee has life-threatening inflammation of the brain; matriarch of a large Louisiana family hosts flesh eating infection; reality TV competitor in California returns from Fiji with creature attacking vital organs from the inside.
Episode: 5x02 | Airdate: Oct 16, 2014
When three unsuspecting young families are thrown into a tailspin, they are shocked to learn of the tiny culprits wreaking havoc on their lives. First, a married couple in California watch helplessly as their son struggles for every last breath.
Episode: 5x03 | Airdate: Oct 23, 2014
A Massachusetts EMT is shattered by a routine emergency call when she discovers that the victim is her son. A self-described tough guy in New Jersey is reduced to tears when something sinister starts to rip apart his intestines.
Episode: 5x04 | Airdate: Nov 6, 2014
Illinois contractor who suffers bump on his head finds himself fighting for his life in the ICU; college football player is in agony from life threatening blinding headaches; mystery illness threatens life of boy 48 hours after beach day.
Episode: 5x05 | Airdate: Nov 13, 2014
The lives of three young people are suddenly turned upside down. In South Dakota, what begins as a common sore throat quickly spirals out of control for a fifteen year old girl, as a rare and dangerous affliction leaves her clinging to life.
Episode: 5x06 | Airdate: Nov 20, 2014
A war veteran, a PhD scientist, and a newborn, all clinging to life by a string. In Tennessee, new parents are horrified when a deadly infection pushes their baby daughter to the brink of death.
Episode: 5x07 | Airdate: Dec 4, 2014
Christmas time is here, and these three victims each receive a monstrous gift. In Florida, a woman is out Christmas shopping when she suddenly feels a stabbing pain in her eye so severe that she believes she sees shadows of worms in her eye.
Episode: 5x08 | Airdate: Dec 11, 2014
Trouble is lurking in the bodies of three different women. In rural Washington State, a teenager's shoulder pain leads to her being quarantined in a matter of days. If doctors can't determine what's attacking her, she'll die.
Episode: 5x09 | Airdate: Dec 11, 2014
Toddler struggles to breathe in Saskatchewan but gets worse in the ER; Virginia teen's seizures and sudden blindness leads to a horrific discovery in her brain; six-year old with rash and high fever ends up in the ER.
Episode: 5x10 | Airdate: Dec 18, 2014
Three healthy people with a love of the outdoors are struck down by a deadly menace that lurks inside them. In Ohio, a young boy wastes away in front of his parents' eyes as a mysterious infection overtakes his body.
Episode: 6x01 | Airdate: Oct 29, 2015
The worlds of three families are turned on their heads. A mysterious outbreak leads to a four year old boy drowning in his own mucus. A wound in a seven year old's knee has a vile cause. And bizarre dreams precipitate a college student's hospitalization.
Episode: 6x02 | Airdate: Oct 29, 2015
The lives of three families are twisted in knots. A mysterious infection brings a tough ultra-marathoner to his knees. A teenager contracts one of the most feared diseases on the planet. And a woman's brain is practically set on fire.
Episode: 6x03 | Airdate: Nov 5, 2015
The lives of three families are thrown out of whack. One infection rips a man's leg apart. A rare brain infection pushes a seven year old girl toward suicide. And another lands a woman in the hospital, eluding the doctors.
Episode: 6x04 | Airdate: Nov 5, 2015
The lives of three families are turned upside down. A couple purchases their dream home, but it turns into a living nightmare. An insidious creature takes a man's spleen. Will he lose his life? And a domestic pet takes a young boy to the edge of death.
Episode: 6x05 | Airdate: Nov 12, 2015
Horrific tales from three families below the Mason/Dixon line; baby faces near death from common household item; man discovers worms crawling throughout his lungs; female boxer fights for her life.
Episode: 6x06 | Airdate: Nov 19, 2015
Three infections terrorize their victims; 2-year-old girl screams in pain and is near death; neuro-psychiatrist experiences multi-organ failure; woman's life hangs by a thread.
Episode: 6x07 | Airdate: Dec 3, 2015
Infection is eating away a college student's eyeball; mysterious infection paralyzes a 6-month-old boy in just 24 hours; mother recovering from giving birth gets a nasty surprise.
Episode: 6x08 | Airdate: Dec 10, 2015
Three infections emerge from the most every day locations. One affliction hits a teenager, which shuts his lungs down. Another attacks the nervous system of a personal trainer. And a third infection eats the blood of a holistic health worker.
Episode: 6x09 | Airdate: Dec 17, 2015
Doctors must cut out half of Christmas baby, Lillian's, brain which is is malformed and causing seizures; PR executive Jenny endures risky surgery on the eve of Hanukkah; school teacher Dawn must have brain surgery on Christmas... while she's awake.
Episode: 6x10 | Airdate: Dec 22, 2015
A cut on his knee causes a teenage boy to become feverish and fatigued; Dee and Tom experience nasty rashes, difficulty breathing and memory loss after they move into their new home in N.M.; in Hawaii, something is destroying Jade's retinas.
Episode: 7x01 | Airdate: Oct 6, 2016
A boy getting sick, upchucks his own feces; teenager contracts horrifying disease; young girl's illness is undiagnosable, so she is quarantined.
Episode: 7x02 | Airdate: Oct 13, 2016
A baby falls mysteriously ill and struggles to breathe; a man has something living in an embarrassing place; a woman's weight gain confounds experts.
Episode: 7x03 | Airdate: Oct 20, 2016
A mysterious infection brings a tough football player to his knees. To her horror, a stay-at-home mom has parasites devouring her eyeball. And a marina dock master is attacked by sea creatures!
Episode: 7x04 | Airdate: Oct 27, 2016
A family's cruise ship vacation turns into a living nightmare when their two year old swallows a sinister monster. A mother of two is plagued with a mysterious infection. Deadly parasites hijack the brain of a six-year-old boy.
Episode: 7x05 | Airdate: Nov 3, 2016
Monsters can hijack our bodies in any number of ways. A man breaks out in a mysterious painful rash. A woman experiences bouts of piercing pain in her throat. A teen girl is left debilitated by strange spells of dizziness and fatigue.
Episode: 7x06 | Airdate: Nov 10, 2016
Three families are turned upside down by deadly monsters. A four-year-old boy is plagued by crippling pain. A college student with a small cut finds herself fighting for her life. A woman is driven to insanity by an intruder in her own body.
Episode: 7x07 | Airdate: Dec 15, 2016
A Christmas baby is born, but doctors find her brain was infected in utero. A woman thinks a worm is in her eye, and a man gets a nasty surprise after surgery.
Episode: 8x01 | Airdate: Oct 15, 2017
A young girl is brought to the hospital with stabbing pains in her scalp. A wife and mother is struck down by a severe string of mysterious symptoms that threaten to tear her family apart. A deadly invader turns a relaxing vacation into a nightmare.
Episode: 8x02 | Airdate: Oct 15, 2017
A man falls comatose. A college student's sore throat turns deadly. A woman's bizarre symptoms confound experts.
Episode: 8x03 | Airdate: Oct 22, 2017
A man experiences bizarre swelling around his eye. A 12-year-old girl falls mysteriously ill. A young woman is struck by a bizarre set of symptoms that leaves her on the verge of madness, and neither her family nor her doctors can understand why.
Episode: 8x04 | Airdate: Oct 29, 2017
An infant falls mysteriously ill. A biology professor becomes an unexpected host. A family man is brought to the brink.
Episode: 8x05 | Airdate: Nov 5, 2017
Doctors discover an invader in a young man's brain; a new mother is in critical condition; a young boy's illness defies antibiotics.
Episode: 8x06 | Airdate: Nov 12, 2017
A boy is struck down with a strange condition. A woman has bizarre symptoms that push her to the brink of madness. A toddler falls into a trance-like state.
Episode: 8x07 | Airdate: Nov 19, 2017
A teenager develops mysterious blotchy sores. A tough athlete is struck down by a rare disease. A woman battles strange bouts of vomiting.
Episode: 8x08 | Airdate: Nov 26, 2017
A man starts coughing up blood. A newlywed husband is struck down by a rare disease. A young father experiences crippling abdominal pain.
Episode: 8x09 | Airdate: Dec 3, 2017
An infant is suddenly paralyzed. A young father grapples with a monster that threatens to blind him. A woman's excruciating pain confounds experts.
Episode: 8x10 | Airdate: Dec 10, 2017
A young woman is struck down by a dangerous parasite. An infant becomes mysteriously ill. A midwestern man is brought to the brink by a deadly fungus.
Episode: 8x11 | Airdate: Dec 17, 2017
A man bangs his head and is left fighting a rare medical mystery; a wound in a boy's knee harbors an uninvited guest; a man unwittingly feeds his own intended killer.
Episode: 8x12 | Airdate: Dec 17, 2017
A man develops a strange growth on his wrist. A nurse sees twig-like pieces in her urine. A pregnant woman falls dangerously ill with flu-like symptoms.
Episode: S08 Special | Airdate: Dec 21, 2017
Three unsuspecting victims see the holidays turn from a time of joy and merriment to fear and agonizing pain as they battle against mystery attackers trying to destroy them from the inside out.