Gravity Falls: Season 2 Episode 18: Weirdmageddon: Part 1
Starring: Jason Ritter, Alex Hirsch, Louis C.K., J.K. Simmons, Patrick McHale, Andy Merrill, Jackie Buscarino, Linda Cardellini
Length: 23 minutes
On Air Date: 26 Oct 2015
Gravity Falls: S02E18 Description: Bill has returned to take down the Pines family. But this time he has brought some of his friends with him.