Rodger Bumpass as Hanover Fiste / Dr. Anrak (voice)

John Candy as Desk Sergeant / Dan / Den / Robot (voice)

Jackie Burroughs as Katherine (voice)

Joe Flaherty as Lawyer / General (voice)

Don Francks as Grimaldi / Co-Pilot / Barbarian (voice)

Marilyn Lightstone as Whore / Queen (voice)

Eugene Levy as Sternn / Male Reporter / Edsel (voice)

Harold Ramis as Zeke (voice)

Caroline Semple as Girl (voice)

Richard Romanus as Harry Canyon (voice)

Susan Roman as Girl / Satellite (voice)

Al Waxman as Rudnick (voice)

Harvey Atkin as Alien / Henchman (voice)

Glenis Wootton Gross as Whore (voice)

John Vernon as Prosecutor (voice)

George Touliatos as Pilot / Barbarian (voice)

August Schellenberg as Norl / Taarak (voice)

Vlasta Vrana as Barbarian Leader (voice)

Alice Playten as Gloria (voice)

Percy Rodriguez as Loc-Nar (voice / uncredited)