Marie Curie
Pierre Curie
Eugene Curie
Professor Jean Perot
David Le Gros
Lord Kelvin
Madame Eugene Curie (as Dame May Whitty)
President of University
Madame Perot
Dr. Becquerel
Reporter
Irene Curie - Age 5
Narration Spoken By (voice)
Tall Woman (uncredited)
Man at Accident (uncredited)
Swedish Queen (uncredited)
Lecturer (voice) (uncredited)
Professor (uncredited)
Cart Driver (uncredited)
Assistant Tailor (uncredited)
Woman at Accident (uncredited)
Board Member (uncredited)
Prof. Constant (voice) (uncredited)
Perot Granddaughter (uncredited)
Lucille (uncredited)
Seamstress (uncredited)
Professor Roget (uncredited)
Son (uncredited)
Bit Part (uncredited)
Businessman (uncredited)
Singing Professor (uncredited)
Master Michaud (uncredited)
Wedding Guest (uncredited)
Photographer (uncredited)
Dr. Bladh (uncredited)
President of Businessman's Board (uncredited)
Eve at 18 Months (uncredited)
Monsieur Michaud (uncredited)
Nurse (uncredited)
Madame Michaud (uncredited)
King Oscar (uncredited)
Conference Guest (uncredited)
Driver (uncredited)
Proud Papa (uncredited)
Jewelry Salesman (uncredited)
Doctor (uncredited)