Lyle Talbot

Character: Lt. Bob Bennett

Irving Pichel

Character: Dr. Herbert Stander

Julie Bishop

Character: Joan Martel

Sheila Bromley

Character: Poison Mary Slavish

Anthony Averill

Character: Dirk - Stander's Aide

Russell Hopton

Character: Harry 'The Carver' Bogard

Julian Madison

Character: Paul - Stander's Aide

Eddie Holden

Character: Ole Olson

Wheeler Oakman

Character: John Ritter

Stanley Blystone

Character: Capt. Mike Briggs

Leander De Cordova

Character: Ezra Matthews

Demetrius Alexis

Character: Steve Murano

Skelton Knaggs

Character: Jesse Bixel

Carleton Young

Character: Reporter

William N. Chapman

Character: Bill

Jack Gardner

Character: Reporter

Adia Kuznetzoff

Character: Adolph Krantz

Bert LeBaron

Character: Sailor

Fred Walton

Character: Dr. Beemish