George Nader
Roy
Claudia Barrett
Alice
Gregory Moffett
Johnny
John Mylong
The Professor
Selena Royle
Mother
Pamela Paulson
Carla
George Barrows
Ro-Man the Monster / Great Guidance
John Brown
Ro-Man / Great Guidance (voice)
John Orlando
Property Master
Jack Greenhalgh
Director of Photography
Stanley E. Campbell
Makeup Artist
Robert E. Barnes
Assistant Director
Phil Tucker
Director
Merrill G. White
Editor
Alan Winston
Associate Producer
Al Zimbalist
Executive Producer
Producer
Clarence Eurist
Production Supervisor
Elmer Bernstein
Original Music Composer
Wyott Ordung
Screenplay
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