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Pete Smith
Narrator (voice)
Margaret Bert
Nurse (uncredited)
André Cheron
Henri Antoine Becquerel (uncredited)
James Conaty
American Scientist (uncredited)
Eddie Hart
Photographer (uncredited)
Emmett Vogan
Pierre Curie (uncredited)
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Released
Metro-Goldwyn-Mayer
Jacques Tourneur
Director
Richard Goldstone
Writer
N. Gayle Gitterman
Producer
