S1 E1 • Le zombie de ma sœur

When Dipper and Mabel Pines arrive to spend their summer break in the remote town of Gravity Falls, Mabel’s suspiciously weird new boyfriend causes the twins to come face to face with the town’s strange and uncanny secrets.

Première diffusion : 15 juin 2012

S1 E2 • La légende du Gloutosaure

When Dipper and Mabel hear rumors of a sea monster that lives at the bottom of the local lake, they enlist Soos to take them on a boating expedition to prove it really does exist.

Première diffusion : 29 juin 2012

S1 E3 • Le musée de cire

When someone tampers with Mabel's life-size wax statue of Grunkle Stan, she and Dipper set out to find the culprit. Meanwhile, Grunkle Stan mourns over the loss of his wax doppelganger.

Première diffusion : 30 juin 2012

S1 E4 • Dans les griffes du Devin

Dipper and Mabel discover that their seemingly cherubic new neighbor, Lil' Gideon, happens to be the town's adored psychic. But when Lil' Gideon guilts her into dating him, she and Dipper soon learn that his cuteness can fade all too quickly.

Première diffusion : 6 juillet 2012

S1 E5 • La Supérette Fantôme

Dipper is invited by Wendy and her teen friends on a trek that leads to an abandoned convenience store that may be haunted.

Première diffusion : 13 juillet 2012

S1 E6 • Question de virilité

In a quest to attain manliness, Dipper ventures into the forest to battle the notorious Multi-Bear. Meanwhile, Mabel tries to teach Grunkle Stan how to be attractive to women, particularly the waitress in the local diner, Lazy Susan.

Première diffusion : 20 juillet 2012

S1 E7 • L'armée de Dipper

Stan throws a big weekend party to promote the Mystery Shack. Dipper makes clones of himself to impress Wendy. Mabel fights for the Party Queen title in honor of her two friends.

Première diffusion : 10 août 2012

S1 E8 • Complot pour les idiots

When Dipper and Mabel discover evidence that the reported town founder is a hoax, they set out to expose the historical cover-up and prove that Mabel's silliness is not a bad thing.

Première diffusion : 17 août 2012

S1 E9 • Le Gardien du Temps

Dipper wants to correct a mistake he made in the past with assistance from a time machine. Mabel is overjoyed when she wins a pet pig at a fair.

Première diffusion : 24 août 2012

S1 E10 • Un jeu plus vrai que nature

After being challenged to a fight by Wendy's boyfriend Robbie, Dipper is shocked when his favorite Fight Fighters fighter, Rumble McSkirmish, comes to life to defend him, but Dipper soon loses control of Rumble and has to find a way to stop him from seriously injuring Robbie

Première diffusion : 14 septembre 2012

S1 E11 • Un petit problème

Dipper is self-conscious that Mabel is taller than him and seeks a magic solution. Meanwhile Lil' Gideon takes advantage of Dipper's and Mabel's height discrepancy.

Première diffusion : 28 septembre 2012

S1 E12 • Un drôle d'Halloween

Dipper and Mabel go trick-or-treating in the summer and encounter a candy-loving monster who threatens to devour them if they don't bring him sweet things to eat.

Première diffusion : 5 octobre 2012

S1 E13 • Mabel aux commandes

Mabel bets Grunkle Stan that she will make more money at the Mystery Shack by treating people nicely than he does by being rude and cranky.

Première diffusion : 15 février 2013

S1 E14 • Un puit d'histoires

While Stan, Dipper, Mabel and Soos are falling in a bottomless pit, they tell stories to pass the time.

Première diffusion : 1 mars 2013

S1 E15 • En eaux profondes

When Mabel befriends a cute merman trapped in the public pool, she's determined to help him out. Meanwhile, Dipper decides to volunteer as a lifeguard to see Wendy.

Première diffusion : 15 mars 2013

S1 E16 • Carpet Diem

The twins discover a hidden room inside the Mystery Shack and compete over who should have it.

Première diffusion : 5 avril 2013

S1 E17 • Mes idoles sont des clones

When Mabel discovers that her favorite boy band is actually a bunch of imprisoned clones, she sets them free, only to decide on keeping them for herself. Meanwhile, Dipper is convinced that Robbie plans to brainwash Wendy with a secret message hidden inside one of his songs.

Première diffusion : 19 avril 2013

S1 E18 • Land Before Swine

When Waddles is snatched by a prehistoric beast, Dipper, Mabel, Stan, Soos, and Old Man McGucket must journey to a mysterious land trapped in time to rescue him.

Première diffusion : 28 juin 2013

S1 E19 • Dreamscaperers (1)

Dipper, Mabel, and Soos must travel through Grunkle Stan's mind to defeat a tricky dream demon summoned by Lil Gideon.

Première diffusion : 12 juillet 2013

S1 E20 • Gideon Rises (2)

Li'l Gideon swindles the Mystery Shack away, forcing Grunkle Stan and the kids to move in with Soos. While Stan weighs how he can still care for his grandniece and nephew, they decide to take on Gideon.

Première diffusion : 2 août 2013