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Pete Smith as Narrator (voice) |
 |
Margaret Bert as Nurse (uncredited) |
 |
André Cheron as Henri Antoine Becquerel (uncredited) |
|
James Conaty as American Scientist (uncredited) |
|
Eddie Hart as Photographer (uncredited) |
 |
Emmett Vogan as Pierre Curie (uncredited) |
| Directing | Jacques Tourneur | Director |
| Writing | Richard Goldstone | Writer |
| Writing | N. Gayle Gitterman | Writer |
| Production | Pete Smith | Producer |
