Robot Monster

George Nader

Roy

Claudia Barrett

Alice

Gregory Moffett

Johnny

Jack Mylong-Münz

The Professor

Selena Royle

Mother

P

Pamela Paulson

Carla

George Barrows

Ro-Man the Monster / Great Guidance

John Brown

Ro-Man / Great Guidance (voice)

P

Phil Tucker

Director

A

Al Zimbalist

Executive Producer