Calificación
Reparto

Margaret O'Brien
Alpha

James Craig
Mike Regan

Marsha Hunt
Katie Mallory

Philip Merivale
Professor Peter Vincent

Henry O'Neill
Professor Josh Pringle

Donald Meek
Professor Catty

Keenan Wynn
Packy Roost

Alan Napier
Dr. Woodring

Sara Haden
Rhoda Kitterick

Kathleen Lockhart
Mrs. Catty

Howard Freeman
Professor Richards

Walter Fenner
Professor Endicott

Elisabeth Risdon
Mrs. Pringle

Robert Blake
Jerry

Barbara Bedford
Telephone Operator (uncredited)

Ava Gardner
Hat Check Girl (uncredited)