as Dr. Frank Gordon

as Donal, a searcher

as Sam Julian

as Man in Elevator (uncredited)

as San Francisco Dispatcher (uncredited)

as Penny - Bartender (uncredited)

as Fireman (uncredited)

as Cowhand

as Mike

as Minor Role (uncredited)

as Germ Experiment Victim (uncredited)

as Salesman (uncredited)

as Cowboy (uncredited)

as Montague Underdunk

as Tourist at Bar

as Newsman (uncredited)

as City Clerk (uncredited)

as Mr. Davalos

as Stilwell's Assistant

as Dirk, a Mutate

as Senator

as Raymond Chandler

as Barney (uncredited)