When Gonzo's breakfast cereal tells him that he's the descendant of aliens from another planet, his attempts at extraterrestrial communication get him kidnapped by a secret government agency, prompting the Muppets to spring into action to rescue their friend.
Dave Goelz
Gonzo / Dr. Bunsen Honeydew / Waldorf / The Birdman (voice)
Steve Whitmire
Kermit the Frog / Rizzo the Rat / Beaker / Cosmic Fish #1 / Rainbow / Miss Piggy (assistant) (voice)
Bill Barretta
Pepe the Prawn / Bobo as Rentro / Johnny Fiama / Bubba the Rat / Cosmic Fish #2 (voice)
Jerry Nelson
Robin / Statler / Ubergonzo (voice)
Brian Henson
Dr. Phil Van Neuter / Sal Minella (voice)
Kevin Clash
Clifford (voice)
Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam the Eagle (voice)
Jeffrey Tambor
K. Edgar Singer
