Full Cast
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Margaret O'Brien
Alpha
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James Craig
Mike Regan
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Marsha Hunt
Katie Mallory
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Philip Merivale
Professor Peter Vincent
-
Henry O'Neill
Professor Josh Pringle
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Donald Meek
Professor Catty
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Keenan Wynn
Packy Roost
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Alan Napier
Dr. Woodring
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Sara Haden
Rhoda Kitterick
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Kathleen Lockhart
Mrs. Catty
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Howard Freeman
Professor Richards
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Walter Fenner
Professor Endicott
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Elisabeth Risdon
Mrs. Pringle
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Robert Blake
Jerry
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Barbara Bedford
Telephone Operator (uncredited)
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Ava Gardner
Hat Check Girl (uncredited)
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Mike Mazurki
Fighter (uncredited)
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Pauline Starke
Bobby's Mother (uncredited)
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Eddie Acuff
Policeman (uncredited)
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Hooper Atchley
Pepi (uncredited)
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William Bishop
Reporter (uncredited)
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Naomi Childers
Matron (uncredited)
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Victor Sen Yung
Chinese Man (uncredited)
