A man witnesses a murder in a secluded mansion. When he reports it, there's no evidence of the murder, or that anyone was there. Two years later he wakes up in a hospital room after a polo accident to find he's had amnesia, is now married, and living in Switzerland. Now remembering the incident he returns to England to try to solve the mystery.
| Directing | Gene Levitt | Director |
| Writing | Trevor Wallace | Writer |
| Production | Charles F. Engel | Executive Producer |
| Production | Ian Lewis | Producer |
| Camera | Arthur Grant | Director of Photography |
| Sound | Mike Leander | Music |
| Editing | Bert Rule | Editor |
| Art | Bernard Robinson | Art Direction |
