Rick

Richard Denning

Acting

Louise Madison

Lori Nelson

Acting

Jim Madison

Paul Birch

Acting

Tony Lamont

Mike Connors

Acting

Ruby

Adele Jergens

Acting

Pete

Raymond Hatton

Acting

Radek

Paul Dubov

Acting

Contaminated Man

Jonathan Haze

Acting

Mutant

Paul Blaisdell

Visual Effects

Nelson - Louise's Fiancée in Framed Photograph (uncredited)

Roger Corman

Production

Narrator (voice) (uncredited)

Chet Huntley

Acting