Gravity Falls is an American animated comedy/sitcom from creator/executive producer/writer/director Alex Hirsch which follows city kids Dipper (voiced by Jason Ritter) and Mabel Pines (voiced by Kristen Schaal), who are sent to spend the summer with their eccentric Great Uncle Stan, aka Grunkle Stan (voiced by Hirsch), who runs a tourist trap called The Mystery Shack in a remote northwestern town where nothing is what it seems.  With creatures in the forest, monsters in the lake and time travel a possibility, things get very interesting for the twins as they quickly realize they need each other, in order to unlock the secrets of the quirky and mysterious town.