Kadro (23)
Margaret O'BrienAlpha
James CraigMike Regan
Marsha HuntKatie Mallory
Philip MerivaleProfessor Peter Vincent
Henry O'NeillProfessor Josh Pringle
Donald MeekProfessor Catty
Keenan WynnPacky Roost
Alan NapierDr. Woodring
Sara HadenRhoda Kitterick
Kathleen LockhartMrs. Catty
Howard FreemanProfessor Richards
Walter FennerProfessor Endicott
Elisabeth RisdonMrs. Pringle
Robert BlakeJerry
Barbara BedfordTelephone Operator (uncredited)
Ava GardnerHat Check Girl (uncredited)
Mike MazurkiFighter (uncredited)
Pauline StarkeBobby's Mother (uncredited)
Eddie AcuffPoliceman (uncredited)
Hooper AtchleyPepi (uncredited)
William BishopReporter (uncredited)
Naomi ChildersMatron (uncredited)
Victor Sen YungChinese Man (uncredited)