The kids, along with Old Man McGucket's help, discover there is a secret society in Gravity Falls.
Elenco:
Jason Ritter
,
Kristen Schaal
,
Alex Hirsch
,
Linda Cardellini
,
Carl Faruolo
,
Niki Yang
,
T.J. Miller
,
Jessica DiCicco
,
Scott Menville
,
Michael Rianda
,
Thurop Van Orman
,
Jackie Buscarino
,
Kevin Michael Richardson
,
Keith Ferguson
,
Gregg Turkington
,
Kari Wahlgren
,
Stephen Root
,
Nathan Fillion
,
John Roberts
,
Greg Cipes
,
Jennifer Coolidge
,
John DiMaggio
,
Will Forte
,
Dee Bradley Baker
,
Frank Welker
,
Grey Griffin
.