Alpha

Margaret O'Brien

Acting

Mike Regan

James Craig

Acting

Katie Mallory

Marsha Hunt

Acting

Professor Peter Vincent

Philip Merivale

Acting

Professor Josh Pringle

Henry O'Neill

Acting

Professor Catty

Donald Meek

Acting

Packy Roost

Keenan Wynn

Acting

Dr. Woodring

Alan Napier

Acting

Rhoda Kitterick

Sara Haden

Acting

Mrs. Catty

Kathleen Lockhart

Acting

Professor Richards

Howard Freeman

Acting

Professor Endicott

Walter Fenner

Acting

Mrs. Pringle

Elisabeth Risdon

Acting

Jerry

Robert Blake

Acting

Telephone Operator (uncredited)

Barbara Bedford

Acting

Hat Check Girl (uncredited)

Ava Gardner

Acting

Fighter (uncredited)

Mike Mazurki

Acting

Bobby's Mother (uncredited)

Pauline Starke

Acting

Policeman (uncredited)

Eddie Acuff

Acting

Pepi (uncredited)

Hooper Atchley

Acting

Reporter (uncredited)

William Bishop

Acting

Matron (uncredited)

Naomi Childers

Acting

Chinese Man (uncredited)

Victor Sen Yung

Acting