Margaret O'Brien

Alpha

James Craig

Mike Regan

Marsha Hunt

Katie Mallory

Philip Merivale

Professor Peter Vincent

Henry O'Neill

Professor Joshua Pringle

Donald Meek

Professor Catty

Keenan Wynn

Packy Roost

Alan Napier

Dr. Woodring

Sara Haden

Rhoda Kitterick

Kathleen Lockhart

Mrs. Catty

Walter Fenner

Professor Endicott

Howard Freeman

Professor Richards

Elisabeth Risdon

Mrs. Pringle

Robert Blake

Jerry

Eddie Acuff

Policeman

Hooper Atchley

Pepi

Barbara Bedford

Telephone Operator

William Bishop

Reporter