When Mabel discovers that her favorite boy band is actually a bunch of imprisoned clones, she sets them free, only to decide on keeping them for herself. Meanwhile, Dipper is convinced that Robbie plans to brainwash Wendy with a secret message hidden inside one of his songs.
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 .