23. At the End of the Worlds (2017)
Penn, Sashi, and Boone must travel to the three most dangerous places in the multiverse in order to free Penn's parents as Rippen plans to conquer the Most Dangerous World Imaginable with Larry and those with him after having to close its portal from the other side.
Release date: 2017-07-28
Season number: 2
Episode number: 23
Runtime: minutes
Directors: Adam Henry, Tom De Rosier, Kathleen Good
Writers: Sam Levine, Jeffrey Poliquin
Guest stars
Mark Hamill
as Adam Tom-Kat Badawy (voice)
Olivia Holt
as Amber Briggs (voice)
Beau Bridges
as Sheriff Scaley Briggs (voice)
Maria Bamford
as The President (voice)
Sean Astin
as Blaze (voice)
Blake Anderson
as Hogarth (voice)
Curtis Armstrong
as Super Amazing Bouncy Ball (voice)
James Hong
as Windmill Monster (voice)
Elizabeth Henstridge
as Princess Argelbleccht Blunkenthorthph (voice)
Yvette Nicole Brown
as Boat Maria (voice)
Sonequa Martin-Green
as Pirate Maria (voice)
Paul Reubens
as The Butterman (voice)
Henry Winkler
as The Snowman (voice)
Diana Rigg
as Mayor Pink Panda (voice)
Adam West
as Captain Super Captain / Professor Evil Professor (voice)
Jeff Ross
as Sonny (voice)
Marc Maron
as Piv (voice)
Lauren Lapkus
as Matilda (voice)
Cast
Thomas Middleditch
as Penn Zero (voice)
Lea Thompson
as Vonnie (voice)
Adam Devine
as Boone Wiseman (voice)
Rosie Perez
as Aunt Rose (voice)
Alfred Molina
as Rippen (voice)
Larry Wilmore
as Larry (voice)
Sam Levine
as Phyllis (voice)
Tania Gunadi
as Sashi Kobayashi (voice)
Gary Cole
as Brock (voice)
Lenny Venito
as Uncle Chuck (voice)
Rest of guest stars - click here to expand
Paul Alborough - Mayor Direginald Hindenburg (voice)