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 Sgt. Conners

as Big Joe (uncredited)

as Policeman (uncredited)

as Officer Garrett (uncredited)

as Marine (Uncredited)

as Swede (uncredited)

as Bouncer

as Red

as Bill Cormack

as Chief Petty Officer (uncredited)

as Brack Warren

as Dawson

as Coach Jimmy Wayburn

as Lew West

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

as Mike - Dynamo Operator (uncredited)

as Cowboy Outside Bank

as Corporal (uncredited)