Trailer
Cast
Teddy Infuhr
Son (uncredited)
María Pagés
Woman at Accident (uncredited)
Francis Pierlot
Monsieur Michaud (uncredited)
George Davis
Cart Driver (uncredited)
Walter Pidgeon
Pierre Curie
Reginald Owen
Dr. Becquerel
James Kirkwood
Board Member (uncredited)
Gene Lockhart
Bit Part (uncredited)
Arthur Shields
Businessman (uncredited)
Marek Windheim
Jewelry Salesman (uncredited)
Wyndham Standing
King Oscar (uncredited)
Gigi Perreau
Eve at 18 Months (uncredited)
Edward Fielding
Board Member (uncredited)
Charles Trowbridge
Board Member (uncredited)
Michael Visaroff
Proud Papa (uncredited)
May Whitty
Madame Eugene Curie
Isabel La Mal
Woman at Accident (uncredited)
Frederick Worlock
Businessman (uncredited)
Greer Garson
Marie Curie
James Hilton
Narration Spoken By (voice)
Guy D'Ennery
Professor (uncredited)
Ilka Grüning
Seamstress (uncredited)
Victor Francen
President of University
Elsa Bassermann
Madame Perot
Van Johnson
Reporter
Lumsden Hare
Professor Roget (uncredited)
Ray Teal
Driver (uncredited)
Albert Bassermann
Professor Jean Perot
C. Aubrey Smith
Lord Kelvin
Margaret O'Brien
Irene Curie - Age 5
Miles Mander
Businessman (uncredited)
Eustace Wyatt
Doctor (uncredited)
Moroni Olsen
President of Businessman's Board (uncredited)
Ray Collins
Lecturer (voice) (uncredited)
Al Ferguson
Man at Accident (uncredited)
Alan Napier
Dr. Bladh (uncredited)
Almira Sessions
Madame Michaud (uncredited)
William Edmunds
Cart Driver (uncredited)
Howard Freeman
Prof. Constant (voice) (uncredited)
George Meader
Singing Professor (uncredited)
Robert Walker
David Le Gros
Henry Travers
Eugene Curie
Ruth Cherrington
Swedish Queen (uncredited)
Lisa Golm
Lucille (uncredited)