Générique complet
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)
Jacques Tourneur
Réalisation
N. Gayle Gitterman
Scénario
Richard Goldstone
Production
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