as Doc (voice) (uncredited)
as Bearded Man on Ship (uncredited)
as Harkness Boyd
as Jerry Sidon
as Doc (voice) (archive footage)
as Jim Conwell
as Salesman
as Dick Saunders
as Arthur Tirrey - Casting Director
as Mr. Pippensigal
as Marmaduke Grubb
as Vale
as Senator Sam H. Smiley
as Arthur Sidney
as Professor Kockerthaler
as Winston Gates
as Horace Kane
as Professor Washburn
as Himself
as Announcer
