A middle-aged professor's young bride and his assistant plan to commit a double murder disguised as a "Crime Passionel", but discover too late that one of their intended victims has become a fellow conspirator.
Unfortunately the movie Praying Mantis is not yet available on HBO Max.
| Writing | Hubert Monteilhet | Novel |
| Directing | Jack Gold | Director |
| Writing | Philip Mackie | Writer |
| Sound | Brian Simmons | Sound Recordist |
| Sound | Keith Batten | Boom Operator |
| Editing | Keith Palmer | Editor |
| Camera | John Coquillon | Director of Photography |
| Production | Irene Lamb | Casting |
| Production | Ian Warren | Producer |
| Art | Simon Wakefield | Set Decoration |
| Directing | Renée Glynne | Continuity |
| Production | Dickie Bamber | Producer |
| Lighting | Frank Heeney | Gaffer |
| Costume & Make-Up | Bridget Sellers | Costume Design |
| Costume & Make-Up | Norman Dickens | Costume Design |
| Costume & Make-Up | Helen Lennox | Hairstylist |
| Art | Robert Cartwright | Production Design |
| Camera | Herbert Smith | Camera Operator |
| Costume & Make-Up | Mary Hillman | Makeup Artist |
| Costume & Make-Up | John Hills | Makeup Artist |
| Sound | Carl Davis | Original Music Composer |
