Gravity Falls ended after two seasons because its creator chose to finish it
Most cartoons end when a network cancels them. Gravity Falls stopped because Alex Hirsch said the story was done. He insisted the show wasn't being cancelled but finished, entirely his decision. By then his tale of twins spending a strange summer in Oregon was Disney XD's top-rated show and had won Emmys.
The premise draws on Hirsch's own childhood. Twelve-year-old twins Dipper and Mabel Pines leave Piedmont, California, where Hirsch grew up, to spend the summer with their great-uncle Stan, who runs a tourist trap called the Mystery Shack in the fictional town of Gravity Falls. Dipper finds a journal cataloguing the town's paranormal creatures. Hirsch based the twins' bond on summers with his own twin sister, roadside oddities they visited such as the Mystery Spot, and a highway sign pointing to a place named Boring.
Hirsch grew up on Twin Peaks, The X-Files and The Simpsons, which taught him that animation could be funnier than live action and need not be only for children. At the California Institute of the Arts he turned down Jeffrey Katzenberg of DreamWorks because he wanted to work for Disney, and made an 11-minute student film that became the pitch. After writing for The Marvelous Misadventures of Flapjack alongside Pendleton Ward and co-developing Fish Hooks, he got his series green-lit, premiering on 15 June 2012.
He had the whole arc in mind from the start and expected two or three seasons, but found production so draining he first planned to stop after one, on a cliffhanger. Jon Stewart, whose children loved the show, and Patrick McHale, creator of Over the Garden Wall, talked him round. Episodes were built in a writers' room around a character-driven subplot, then revised heavily by Hirsch and creative director Mike Rianda before storyboarding. Scheduling was erratic, with the second season moving to Disney XD in 2014.
The final episode aired on 15 February 2016. The show won two Emmys, three Annie Awards and a BAFTA Children's Award, and set ratings records for Disney XD. Its villain, the one-eyed triangle demon Bill Cipher, later got his own teen novel, The Book of Bill, in 2024.
Source: Gravity Falls
