Alpha

Mike Regan

Katie Mallory

Professor Peter Vincent

Professor Josh Pringle

Professor Catty

Packy Roost

Dr. Woodring

Rhoda Kitterick

Mrs. Catty

Professor Richards

Professor Endicott

Mrs. Pringle

Jerry

Telephone Operator (uncredited)

Hat Check Girl (uncredited)

Fighter (uncredited)

Bobby's Mother (uncredited)

Policeman (uncredited)

Pepi (uncredited)

Reporter (uncredited)

Matron (uncredited)

Chinese Man (uncredited)