The Snorkel is a 1958 British thriller film from Hammer Films. It was directed by Guy Green and stars Peter van Eyck, Betta St. John and Mandy Miller. It was the last film role for Miller. Plot Paul Decker kills his wife, Madge, by drugging her and then gassing her in a room in their Italian villa, sealing all the windows and doors but concealing himself under floorboards in the room, covered by a rug and using a snorkel attached to air pipes to breathe while hidden. Household servants discover her body in the morning and as the room has been locked and sealed from the inside, it appears to the local Italian police Inspector and British Consulate Mr. Wilson to be a case of suicide, although no suicide note has been found. Madge's teenage daughter Candy arrives from England with her dog Toto and travelling companion Jean Edwards, and immediately accuses her stepfather, Decker, of killing her mother, based on the fact that she believes - correctly - that he also killed her father years before and made it look like an accident. Toto senses Decker's presence under the floorboards but is not taken any notice of. It is suggested that Candy and Jean go to America where Decker will join them later, but Candy is determined to investigate further; she goes to Decker's room to look for evidence, but it is Toto that finds the snorkel but again Candy does not recognise its importance and puts it back in a wardrobe. When Decker finds Candy in the room she leaves shortly afterwards, but Toto again finds the snorkel and Decker realises that the dog is proving a problem and poisons him; Candy again senses the truth and accuses Decker of killing her dog, which he denies. Decker, Jean and Candy go on a beach picnic, and Candy, seeing a man swimming with a snorkel, starts to realise how her mother's murder was carried out; when she then swims out too far, Decker swims out to her, pretending to save her but in reality hoping to drown her and make it look like an accident, but before he can do so Jean also swims out and he gives up on the idea, although again Candy knows what he was trying to do. Decker decides that he will have to kill Candy, and, establishing an alibi as before, lures her