Tom Poston as Prof. Jonathan Jones

Julia Meade as Prof. Virginia Fenster

Fred Clark as Gen. Bullivar

Jim Backus as Prof. Horatio Kellgore

Cecil Kellaway as Dean Joshua Updike

Zeme North as Cynthia Jones

Margaret Dumont as Persephone Updike

James Millhollin as Dr. R.A. Kroner

Carl Don as Josh Bates

Mike Mazurki as Igor

Jimmy Hawkins as Jimmy Kellgore

Judee Morton as Miss Blakiston

Louis Nye as Hugh Fundy

Bess Flowers as Party Guest

Leoda Richards as Party Guest

William Castle as Himself (prologue)

Elaine Martone as Secretary (uncredited)

Bart Patton as Mr. Crane (uncredited)