Trailer
Images
 | 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 |
| N. Gayle Gitterman | Writer |
Production | |
| Pete Smith | Producer |
