Arnold Schwarzenegger
Douglas Quaid / Hauser
Marshall Bell
George / Kuato
Roy Brocksmith
Dr. Edgemar
Rosemary Dunsmore
Dr. Lull
Debbie Lee Carrington
Thumbelina
Ken Strausbaugh
Immigration Officer
Michael Gregory
Rebel Lieutenant
Parker Whitman
Martian Husband
Gloria Dorson
Woman in Phone Booth
Erika Carlsson
Miss Lonelyhearts
Milt Tarver
Commercial Announcer
Monica Steuer
Mutant Mother
Robert Picardo
Johnnycab (voice)
Kamala Lopez
Additional Voices (voice)
Morgan Lofting
Additional Voices (voice)
Patti Attar
Additional Voices (voice)
Bob Bergen
Additional Voices (voice)
Joe Unger
Additional Voices (voice)
Karlyn Michelson
Additional Voices (voice)
Joel Kramer
Harry's Henchman (uncredited)
Andy Armstrong
Richter's Henchman (uncredited)
Graeme Crowther
Richter's Subway Agent (uncredited)
Thomas Ebert
Subway Rider (uncredited)
Frank Allen Forbes
Vestron Soldier (uncredited)
Allan Graf
Harry's Henchman (uncredited)
Peter Kent
Richter's Subway Agent (uncredited)
Steven Lambert
Man Standing Behind Fat Lady (uncredited)
Billy D. Lucas
Richter's Subway Agent (uncredited)
Bennie Moore
Richter's Subway Agent (uncredited)
Terry Richards
Henchman at Cementfactory (uncredited)