On the Italian coast, writer Paul Decker has grown unhappy in his marriage and executes what appears to be a perfect murder of his wife. While Paul is believed to be writing a book in France, his stepdaughter, Candy, suspects him of murdering her mother, as well as her father years before. With the police unwilling to investigate any further, Candy sets out to confirm her suspicions and take Paul down herself.
Unfortunately the movie The Snorkel is not yet available on HBO Max.
| Writing | Jimmy Sangster | Screenplay |
| Editing | Bill Lenny | Editor |
| Production | Michael Carreras | Producer |
| Camera | Jack Asher | Director of Photography |
| Art | John Stoll | Art Direction |
| Directing | Guy Green | Director |
| Writing | Anthony Dawson | Story |
| Writing | Peter Myers | Screenplay |
| Sound | Francis Chagrin | Original Music Composer |
| Editing | James Needs | Editor |
| Costume & Make-Up | Philip Leakey | Makeup Artist |
| Sound | Carlisle Mounteney | Sound |
| Costume & Make-Up | Molly Arbuthnot | Costumer |
| Sound | Ken Cameron | Sound Re-Recording Mixer |
| Sound | Jock May | Sound Recordist |
| Sound | John Hollingsworth | Conductor |
| Production | Don Weeks | Production Manager |
| Production | Anthony Nelson Keys | Associate Producer |
| Production | Renzo Lucidi | Location Manager |
| Costume & Make-Up | Henry Montsash | Hairdresser |
| Directing | Doreen Dearnaley | Continuity |
| Camera | Len Harris | Camera Operator |
| Directing | Tom Walls Jr. | Assistant Director |
