The first season of Gravity Falls officially premiered on June 29, 2012, but the first episode aired as a sneak peek on June 15, 2012. The first episode was available for free download on iTunes, for a brief period of time. The season consisted of 20 episodes.
Twin brother and sister Dipper and Mabel Pines are in for an unexpected adventure when they spend the summer with their great-uncle in the mysterious town of Gravity Falls, Oregon. Upon their arrival, Dipper and Mabel's huckster great-uncle, also known as Stan Pines, enlists the siblings' to work at the Mystery Shack, a "fun" tourist trap he owns that overcharges unsuspecting customers, with no pay. Although Dipper and Mabel quickly discover The Mystery Shack itself is a hoax, they sense there is something strange about their new town and together they begin to unlock the secrets of Gravity Falls.
- Jason Ritter as Dipper Pines (20/20)
- Kristen Schaal as Mabel Pines (20/20)
- Alex Hirsch as Stan Pines (20/20) and Soos (19/20)
- Linda Cardellini as Wendy Corduroy (16/20)
- Dee Bradley Baker as Waddles (11/20)
- Thurop Van Orman as Gideon Gleeful
- Niki Yang as Candy Chiu
- Carl Faruolo as Grenda
- TJ Miller as Robbie
- Jackie Buscarino as Pacifica Northwest
- Kevin Michael Richardson as Sheriff Blubs
- Keith Ferguson as Deputy Durland
- Alex Hirsch as Old Man McGucket, Bill Cipher, Gnomes, and Quentin Trembley
- Stephen Root as Bud Gleeful
- Jennifer Coolidge as Lazy Susan
- Gregg Turkington as Toby Determined
- John DiMaggio as Manly Dan
- Will Forte as Tyler
- Coolio as Wax Coolio
- Larry King as Wax Larry
- John Oliver as Sherlock Holmes
- Alfred Molina as Multi-Bear
- Matt Chapman as Mermando
- Brian Bloom as Rumble McSkirmish
- Lance Bass as Sev'ral Timez
- See also: Episode guide
|Season premiere||Season finale|
|1||20||June 15, 2012||August 2, 2013|
|June 15, 2012||618G-107||3.4|
|Young twins Dipper and Mabel Pines arrive to spend their summer break with their Great Uncle Stan, aka Grunkle Stan, in the remote town of Gravity Falls.|
|2||"The Legend of the Gobblewonker"
|June 29, 2012||618G-101||3.1|
|When Dipper and Mabel hear rumors that a sea monster lives at the bottom of the local lake, they enlist Soos to take them on a boating expedition to prove it really does exist.|
|June 30, 2012||618G-103||NA|
|When someone tampers with Mabel's life-size wax statue, she and Dipper set out to find the culprit. Meanwhile, Grunkle Stan mourns over the loss of his wax doppelganger.|
|4||"The Hand That Rocks the Mabel"
|July 6, 2012||618G-105||3.0|
|When Grunkle Stan convinces Mabel to go on a date with their seemingly cherubic new neighbor, Gideon Gleeful, to question his authenticity as a psychic, she soon learns that his cuteness can immediately vanish.|
|July 13, 2012||618G-104||3.6|
|When Dipper tries to impress Wendy by acting older than he really is, he's invited to join a group of teenagers on a trek that leads to an old abandoned convenience store rumored to be haunted.|
|6||"Dipper vs. Manliness"
|July 20, 2012||618G-106||3.1|
|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 become an attractive man to women, particularly, Lazy Susan.|
|August 10, 2012||108||4.2|
|When Stan throws a party, Dipper uses an off-kilter copy machine to make clones of himself so he can impress Wendy. Meanwhile, Mabel stands up for her friends, and she fights for the Party Queen title in their honor.|
|August 17, 2012||618G-110||3.9|
|When Dipper and Mabel discover evidence that the reported town founder is a hoax, they set out to expose the historical cover-up and to prove that Mabel's silliness is not just an embarrassing personality trait.|
|9||"The Time Traveler's Pig"
|August 24, 2012||618G-109||4.1|
|When Dipper wishes he could go back in time and undo a mistake, he discovers that there is a real time machine for his upper advantages. Meanwhile, Mabel wins a pet pig, which she names Waddles, at the fair.|
|September 14, 2012||618G-111||2.9|
|After being challenged to a video game battle by Wendy's boyfriend Robbie, Dipper is shocked when his favorite playable fighter, Rumble McSkirmish, comes to life to defend him. However, Dipper eventually loses control over Rumble, and he has to find a way to stop Rumble.|
|September 28, 2012||618G-102||2.6|
|Dipper feels self-conscious that Mabel is taller than him, and she is suddenly becoming the alpha twin. So, he seeks out a magical way to grow taller. However, his plan backfires tremendously.|
|October 5, 2012||112||3.5|
|It’s Gravity Falls’ version of Halloween in Summer with jack-o'-melons and lots of trick-or-treating. Dipper and Mabel are excited to join in on the fun, but when Wendy casually mentions that trick-or-treating is for kids, Dipper’s whole outlook on the evening changes. The night gets even more complicated when a monster that Dipper accidentally insulted makes them fulfill his candy quota by night’s end or else he will eat them.|
|February 15, 2013||113||3.5|
|Stan challenges Mabel to run the Shack when she questions his bossing methods.|
|March 1, 2013||114||3.1|
|While Stan, Dipper, Mabel, and Soos are falling in a bottomless pit, they tell stories to pass the time.|
|15||"The Deep End"
|March 15, 2013||115||4.5|
|When Mabel befriends a cute merman trapped in the public pool, she's determined to bust him out.|
|April 5, 2013||116||3.4|
|The twins discover a hidden room inside the Mystery Shack, and they compete over who should have it.|
|April 19, 2013||618G-119||3.2|
|When Mabel discovers that her favorite boy band is actually a bunch of imprisoned clones, she wants to set them free. However, after Mabel becomes attached to all of the band members due to nurturing them, she is unwilling to set them free. Meanwhile, Dipper is convinced that Robbie plans to brainwash Wendy with a secret message hidden inside one of his songs.|
|18||"Land Before Swine"
|June 28, 2013||117||3.5|
|When a prehistoric beast snatches Waddles, the Pines family must journey to a land trapped in time to rescue him.|
|July 12, 2013||118||2.7|
|Dipper, Mabel and Soos must travel through Grunkle Stan’s mind to defeat a tricky dream demon summoned by Gideon Gleeful.|
|August 2, 2013||618G-121||3.2|
|Pint-sized huckster Gideon Gleeful has swindled the Mystery Shack away, forcing Dipper, Mabel and Grunkle Stan to move in with dimwitted Soos and his grandmother. When Stan weighs whether he can still take care of his grandniece and grandnephew, Mabel and Dipper decide to take on Gideon.|
The series, created, directed and executive-produced by 2007 California Institute of the Arts (CalArts) graduate Alex Hirsch (Fish Hooks, The Marvelous Misadventures of Flapjack), is a production of Disney Television Animation. Set in the Pacific Northwest woods of Oregon, the animated series features supernatural elements of adventure and mystery, inspired by the real-life summer trips shared by Hirsch and his twin sister while visiting relatives as kids.
Alex Hirsch has provided conflicting information regarding the number of episodes in the first season. On August 8, 2012, he said there would be 21 episodes. However, on July 7, 2013, he implied there are only 20 episodes as Dreamscaperers is the 19th episode. On July 8, 2013, he confirmed his original statement of 21 episodes was incorrect.