A mad scientist uses captured criminals as experiments for his study on "the criminal mind" aboard his private ship.

Lt. Bob Bennett

Dr. Herbert Stander

Joan Martel

Poison Mary Slavish

Dirk - Stander's Aide

Harry 'The Carver' Bogard

Paul - Stander's Aide

John Ritter

Capt. Mike Briggs

Jesse Bixel

Reporter

Adolph Krantz
October 28, 1939

Lt. Bob Bennett

Dr. Herbert Stander

Joan Martel

Poison Mary Slavish

Dirk - Stander's Aide

Harry 'The Carver' Bogard

Paul - Stander's Aide

John Ritter

Capt. Mike Briggs

Jesse Bixel

Reporter

Adolph Krantz

