A mystery novelist devises an insurance scam with his wife's lover – but things aren't exactly as they seem.
| Directing | Joseph L. Mankiewicz | Director |
| Writing | Anthony Shaffer | Screenplay |
| Writing | Anthony Shaffer | Theatre Play |
| Production | Edgar J. Scherick | Executive Producer |
| Sound | John Addison | Original Music Composer |
| Camera | Oswald Morris | Director of Photography |
| Editing | Richard Marden | Editor |
| Art | Ken Adam | Production Design |
| Art | Peter Lamont | Art Direction |
| Art | John Jarvis | Set Decoration |
| Costume & Make-Up | John Furniss | Costume Design |
| Production | Morton Gottlieb | Producer |
| Production | David Middlemas | Associate Producer |
| Costume & Make-Up | Tom Smith | Makeup Artist |
| Costume & Make-Up | Joan White | Hairstylist |
| Production | Frank Ernst | Production Manager |
| Directing | Kip Gowans | Assistant Director |
| Sound | Ken Barker | Sound Recordist |
| Sound | John W. Mitchell | Sound Recordist |
| Sound | Don Sharpe | Sound Editor |
| Sound | Graham V. Hartstone | Sound Re-Recording Mixer |
| Crew | Les Hillman | Special Effects |
| Camera | Jimmy Turrell | Camera Operator |
| Camera | George Whitear | Still Photographer |
| Editing | Mary Kessel | Assistant Editor |
| Sound | John Addison | Music Arranger |
| Sound | John Addison | Conductor |
| Sound | Gary Hughes | Music Arranger |
| Directing | Elaine Schreyeck | Continuity |
| Production | Allan B. Schwartz | Production Executive |
| Crew | Robin Demetriou | Chef |
