Roy Atwell

as Doc (voice) (uncredited)

as Arthur Tirrey - Casting Director

as Bearded Man on Ship (uncredited)

as Professor Kockerthaler

as Mr. Pippensigal

as Doc (voice) (archive footage)

as Professor Washburn

as Dick Saunders

as Jerry Sidon

as Jake Eben

as Vale

as Salesman

as Arthur Sidney

as Senator Sam H. Smiley

as Jim Conwell

as Harkness Boyd

as Marmaduke Grubb

as Julius Vandergulder

as Winston Gates

as Himself