An upper-crust family dinner is interrupted by a police inspector who brings news that a girl known to everyone present has died in suspicious circumstances. It seems that any or all of them could have had a hand in her death. But who is the mysterious Inspector and what can he want of them?
| Directing | Guy Hamilton | Director |
| Production | A.D. Peters | Producer |
| Art | Joseph Bato | Art Direction |
| Writing | Desmond Davis | Screenplay |
| Camera | Edward Scaife | Director of Photography |
| Editing | Alan Osbiston | Editor |
| Costume & Make-Up | Eric Carter | Makeup Artist |
| Directing | Ted Sturgis | Third Assistant Director |
| Sound | Barbara Hopkins | Sound |
| Sound | Red Law | Sound Recordist |
| Camera | Robert Day | Camera Operator |
| Sound | George Stephenson | Sound Recordist |
| Sound | John Cox | Sound Supervisor |
| Sound | Chris Greenham | Sound Editor |
| Sound | Francis Chagrin | Original Music Composer |
| Production | Raymond Anzarut | Production Manager |
| Costume & Make-Up | Bridget Sellers | Wardrobe Master |
| Costume & Make-Up | Henry Montsash | Hairdresser |
| Writing | J. B. Priestley | Theatre Play |
| Directing | Robert Lynn | Assistant Director |
| Costume & Make-Up | Julia Squire | Wardrobe Designer |
| Directing | Pamela Davies | Continuity |
| Sound | Francis Chagrin | Conductor |
| Writing | J. B. Priestley | Writer |
