During a murder hunt game at a country house, to which Hercule Poirot is invited as an "expert", a real murder occurs.
| Writing | Agatha Christie | Novel |
| Sound | John Addison | Music |
| Production | Neil Hartley | Producer |
| Camera | Curtis Clark | Director of Photography |
| Directing | Clive Donner | Director |
| Writing | Rod Browning | Screenplay |
