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