Behemoth, the Sea Monster

Alastair Hunter

Carlstadt

Gene Evans

Deputy Hoag

Howard Lang

First Colonel

Jack MacGowran

Burke Dennings

André Morell

Sextus

Patrick Jordan

Sgt. Major

John Turner

Joab

Lloyd Lamble

Captain 'San Felix'

Ernest Blyth

Scientist at Conference (uncredited)

Leigh Madison

Jean Trevethan

Paul Beradi

Man Listening to Car Radio (uncredited)

Neal Arden

TV Newscaster (uncredited)

Leonard Sachs

Brouhardier

Maurice Kaufmann

Dr. Whitcombe

Henri Vidon

Tom Trevethan