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Diễn viên
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
