"A brilliant surgeon encases his dead son's brain in a large robot body, with unintended results..."
John Baragrey
as Dr. Henry Spensser
Mala Powers
as Anne Spensser
Otto Kruger
as Dr. William Spensser
Robert Hutton
as Dr. John Robert Carrington
Ross Martin
as Dr. Jeremy 'Jerry' Spensser
Ed Wolff
as The Colossus
Charles Herbert
as Billy Spensser
Dick Nelson
as Charles - Chauffeur-Butler
Roy Engel
as Police Inspector
Charles Sherlock
as Airline Pilot
Floyd Knudtson
Editor
Thelma Schnee
Screenplay
Van Cleave
Original Music Composer
William Alland
Producer
Hal Pereira
Art Direction
Eugène Lourié
Director
John B. Goodman
Willis Goldbeck
Story
John F. Warren
Director of Photography
John P. Fulton
Visual Effects
Ralph Axness
Assistant Director
