Obsada:

• Greer Garson Marie Curie
• Walter Pidgeon Pierre Curie
• Henry Travers Eugene Curie
• Albert Bassermann Prof. Jean Perot
• Robert Walker David Le Gros
• C. Aubrey Smith Lord Kelvin
• Dame May Whitty Madame Eugene Curie
• Victor Francen President of University
• Elsa Basserman Madame Perot
• Reginald Owen Dr. Becquerel
• Van Johnson Reporter
• Margaret O'Brien Irene Curie
• James Hilton Narrator
• Mariska Aldrich Tall woman
• Tony Carson Man at accident
• Ruth Cherrington Swedish queen
• Ray Collins Lecturer
• George Davis Cart driver
• Harold De Becker Professor
• Guy D'Ennery Professor
• Franz Dorfler Assistant tailor
• Justine Duney Woman at accident
• Tay Dunn Man at accident
• William Edmunds Cart driver
• Nestor Eristoff Board member
• Al Ferguson Man at accident
• Edward Fielding Board member
• Howard Freeman Prof. Constant
• Linda Lee Gates Perot granddaughter
• Marie Louise Gates Perot granddaughter
• Lisa Golm Lucille
• Ilka Grüning Seamstress
• Lumsden Hare Prof. Roget
• Teddy Infuhr Son
• James Kirkwood Board member
• Isabel La Mal Woman at accident
• Gene Lockhart Bit part
• Miles Mander Businessman
• George Meader Singing professor
• Dickie Meyers Master Michaud
• Noel Mills Wedding guest
• Leo Mostovoy Photographer
• Alan Napier Dr. Bladh
• Moroni Olsen President of Businessman's Board
• Maria Page Woman at accident
• Gigi Perreau Eve
• Francis Pierlot Monsieur Michaud
• Nita Pike Woman at accident
• Dorothy Raye Nurse
• Almira Sessions Madame Michaud
• Arthur Shields Businessman
• Wyndham Standing King Oscar
• Ray Teal Driver
• Charles Trowbridge Board member
• Michael Visaroff Proud papa
• Marek Windheim Jewelry salesman
• Frederick Worlock Businessman
• Eustace Wyatt Doctor