Strange things are happening in the evening at the mansion: glass things break without any apparent reason. Professor Calculus, somewhat apathetic to the whole series of events, leaves the following day to attend a conference on nuclear physics in Geneva. Foreign powers get wind of his work and send their agents to investigate.
| Directing | Ray Goossens | Director |
| Writing | Hergé | Comic Book |
| Production | Raymond Leblanc | Producer |
| Writing | Charles Shows | Screenplay |
| Sound | Ralph Darbo | Original Music Composer |
