Albert Einstein
Marie Curie
Preston Preston
Mr. Einstein
Mrs. Einstein
The Blonde
The Brunette
Manager
Wolfgang Bavarian
Rudy Bavarian / Tasmanian Devil
Desk Clerk
Bright Clerk
Inventor Couple
Nihilist
Bursar
Lecturer
Droving Student
Randy Student
Prudish Student
Chinese Student
Kid
Lunatic Professor
Ernest Rutherford
Brian Asprin
Nurse
Gate Guard
Scientists Guard
Cat Pie Cook
Asylum Guard
Asylum Guard (as Ted Reid)
Crazed Lunatic
Mr. Curie
Mrs. Curie
Charles Darwin
Marconi
Wilbur Wright
Sigmund Freud
Freud's Mother
Lumiere Brothers
Thomas Edison
African Lady
Emotional Mother
Baby Scientist
Clarke Gable
Admiral Shackleton
Darwin's Bodyguard
Drunk
Darwin's Beagle
Country Girl Fan
Aboriginal Dancer (as David Ngoom)
News Cameraman
Country Yokel
Hospital Patient (uncredited)