The Colossus of New York

John Baragrey

Dr. Henry Spensser

Mala Powers

Anne Spensser

Otto Kruger

Dr. William Spensser

Robert Hutton

Dr. John Robert Carrington

Ross Martin

Dr. Jeremy 'Jerry' Spensser

Ed Wolff

The Colossus

Charles Herbert

Billy Spensser

Dick Nelson

Charles - Chauffeur-Butler

Roy Engel

Police Inspector

Charles Sherlock

Airline Pilot

George Douglas

Sam Harris