Dr. Erik von Steiner
Preston Foster
Dr. Steve Connors
Philip Carey
Councilwoman
Gloria Leslie
Android
Molly Glessing
The Mutant
Peter Strudwick
Miss Hollister
Margaret Seldeen
Square-Frame Technician
Forrest J. Ackerman
Carol White
Merry Anders
Dr. Varno
John Hoyt
Councilman Willard
Dennis Patrick
Gadra
Joan Woodbury
Danny McKee, the Electrician
Steve Franken
Preston
Berry Kroeger
Raymond
J. Edward McKinley
Reena
Delores Wells
Story
Ib Melchior
Screenplay
Director
Director of Photography
Vilmos Zsigmond
Associate Producer
Don Levy
Makeup Artist
Marc Snegoff
Producer
Bill Redlin
Art Direction
Ray Storey
David L. Hewitt
Original Music Composer
Richard LaSalle
Script Supervisor
Hannah Scheel