Richard Denning
Rick
Lori Nelson
Louise Madison
Paul Birch
Jim Madison
Mike Connors
Tony Lamont
Adele Jergens
Ruby
Raymond Hatton
Pete
Paul Dubov
Radek
Jonathan Haze
Contaminated Man
Paul Blaisdell
Mutant
Roger Corman
Nelson - Louise's Fiancée in Framed Photograph (uncredited)
Chet Huntley
Narrator (voice) (uncredited)
