Episode: 1x01 | Airdate: Jan 18, 2015
On her 14th birthday, Princess Star Butterfly receives a magical wand, but when she sets fire to the castle, she is sent to Earth to train. There, she enrolls in Echo Creek Academy where the principal pairs her with Marco Diaz, a reputed "safe kid". Upon befriending Marco, Star ends up discovering her skills when she is attacked by Ludo and his army of monsters.
Episode: 1x02 | Airdate: Jan 18, 2015 (30 min)
Star receives a visit from Flying Princess Pony Head, her best friend from Mewni. Pony Head is jealous that Marco is Star's best friend on Earth. She invites Star and Marco to various dance clubs, but she competes with Marco for Star's attention and tries to strand him at a video arcade. Meanwhile, guards have been hot on Pony Head's trail. Eventually, King Pony Head arrives to have the guards take Pony Head to St. Olga's Reform School for Wayward Princesses.
Episode: 1x03 | Airdate: Mar 30, 2015 (30 min)
Star fails her first test, so she tries to play matchmaker for their math teacher Miss Skullnick to get a better grade. However, she winds up turning her into a troll. When Ludo and his minions attack, one of the monsters falls for Skullnick.
Episode: 1x04 | Airdate: Mar 30, 2015 (30 min)
Echo Creek Academy prepares for a football game against their rival school. Marco tries to protect Ferguson, who has become the team mascot, from being kidnapped. Star takes the concept of going to battle literally, and booby traps the field with bombs, evil kittens, and giant birds.
Episode: 1x05 | Airdate: Apr 6, 2015 (30 min)
Marco breaks his arm before a karate tournament. Star uses her wand to fix it, but transforms it into a tentacle arm. As Star tries to find a spell to reverse it, Marco begins to like his new powers associated with the arm. However, the arm harbors an evil sentience that intends to take over the world.
Episode: 1x06 | Airdate: Apr 6, 2015 (30 min)
When the Diaz family receives a visit by their former foreign exchange student Gustav from Scandinavia, Gustav soon becomes the family favorite with his meatballs, that Star feels neglected. She senses something is wrong when she discovers Gustav harbors some books and media about how to act like a Scandinavian in his backpack.
Episode: 1x07 | Airdate: Apr 13, 2015 (30 min)
Star and Marco are trapped inside a tool shed by Ludo's army. As Marco tries to fashion something to fight them off, he recounts how he tried to cheer up Star because she left her phone number for her crush, a keytar-playing student named Oskar, but he has not called her back.
Episode: 1x08 | Airdate: Apr 13, 2015 (30 min)
When Star's wand runs low on power, she and Marco visit Quest Buy, a large inter-dimensional retail store to buy a new charger. However, the location of the charger department proves extremely difficult to find and to get to. Meanwhile, Ludo and his minions, who are shopping there for a beak sharpener, pursue Star to try to take her wand.
Episode: 1x09 | Airdate: Apr 20, 2015 (30 min)
As an anniversary gift for Marco's parents, Star invites them and Marco to Mewni, but must avoid being seen by her father as Star is not allowed to leave Earth. While they visit a Mewni village, Star sees her father strolling about, and directs the Diaz family into a deadly forest.
Episode: 1x10 | Airdate: Apr 20, 2015 (30 min)
Star and Marco crash Brittney Wong's birthday event which takes place on a party bus. While Star tries to make the party "fun", Marco gets carsick. Ludo and his minions attack and hijack the bus.
Episode: 1x11 | Airdate: Jun 15, 2015 (30 min)
Star experiences "mewberty", that is, her skin breaks out in hearts whenever she is near boys. Although Marco thinks it's much like the Earthling condition, Star's is more extreme. She sprouts hearts all over her body, and transforms into a butterfly creature that captures boys and seals them away. Marco turns to the Glossaryck, a genie inside Star's book of magic, for advice on how to stop her.
Episode: 1x12 | Airdate: Jun 15, 2015 (30 min)
After making prank calls on Star's magic mirror, Marco, Alfonzo, Ferguson, and Star must go to Pixtopia: Land Of The Pixies and pay the bill. When they can't pay it, they are forced to work in a mine shaft. The Pixie Empress flirts with Ferguson.
Episode: 1x13 | Airdate: Jun 22, 2015 (30 min)
Ludo fires his minion Lobster Claws after he accidentally takes off Deer Beard's antler when trying to get Star's wand. Marco tries to help Lobster Claws become good while Star thinks he cannot be reformed.
Episode: 1x14 | Airdate: Jun 22, 2015 (30 min)
Marco discovers that Star has been "sleep spelling", that is, casting spells when sleepwalking. He tries psychology to try to treat her.
Episode: 1x15 | Airdate: Jul 20, 2015
Star accepts her ex-boyfriend Tom's invitation to Demon Prom, but Marco is suspicious of Tom's intentions and crashes the prom to prevent Star from getting her heart broken again.
Episode: 1x16 | Airdate: Jul 20, 2015
Star believes that fortune cookies magically predict the future and should be followed literally.
Episode: 1x17 | Airdate: Jul 27, 2015
Star manages to accidentally freeze time with her wand.
Episode: 1x18 | Airdate: Jul 27, 2015
Star's father shows up unexpectedly for a visit.
Episode: 1x19 | Airdate: Aug 10, 2015 (30 min)
Star must face her greatest fear and travel to St. Olga's Reform School for Wayward Princesses to bust out Flying Princess Pony Head for her birthday.
Episode: 1x20 | Airdate: Aug 17, 2015
Star commerates Mewnipendance Day with a recreation of the historic battle.
Episode: 1x21 | Airdate: Aug 17, 2015
Star sees a commercial for a magical Earth product.
Episode: 1x22 | Airdate: Sep 14, 2015
Miss Skullnik puts Star in charge of a school field trip to the Dimension of Wonders and Amazements.
Episode: 1x23 | Airdate: Sep 14, 2015 (30 min)
Star helps Margo grow a beard.
Episode: 1x24 | Airdate: Sep 21, 2015
Star allies with Buff Frog to rescue Marco from Toffee.
