William Hall

as Bert / Mermonkey (voice)

as Tall Cowboy Boarding Boat (uncredited)

as Kowalski (uncredited)

as Herman (uncredited)

as Anthony Herman

as Slim, Worker

as Big Joe (uncredited)

as Sgt. Conners

as Policeman (uncredited)

as Officer Garrett (uncredited)

as Marine (Uncredited)

as Swede (uncredited)

as Chief Petty Officer (uncredited)

as Red

as Bill Cormack

as Bouncer

as Coach Jimmy Wayburn

as Corporal (uncredited)

as Cowboy Outside Bank

as Mike - Dynamo Operator (uncredited)

as Lew West

as Brack Warren

as Dan Gordon [Chs. 1, 8-10]

as Dawson

as Don DeLuca - Henchman

as John Lawrence

as FBI Agent Watson (uncredited)

as Guard

as Gilman

as Capt. Todd Hayden

as Nicholas 'Nick' Allen

as Rodney Cummings

as Captain Morgan

as Bill Morgan

as Henchman Roach (uncredited)

as Guy Edwards

as Marc Antony

as Babe