Ray Barrett (Harry Spalding), Noel Willman (Dr Franklyn), Jennifer Daniel (Valerie Spalding), Jacqueline Pearce (Anna Franklyn), Michael Ripper (Tom Bailey), John Laurie (Mad Peter Crockett), Marne Maitland (Malay)PRODUCTION:
Director – John Gilling, Screenplay – John Elder [Anthony Hinds], Producer – Anthony Nelson Keys, Photography – Arthur Grant, Music – Don Banks, Music Supervisor – Philip Martell, Special Effects – Bowie Films, Makeup – Roy Ashton, Production Design – Bernard Robinson. Production Company – Hammer/Seven-Arts.
Harry Spalding, a captain in the Royal Grenadiers, inherits a cottage in a small Cornish village after his brother Charles dies in mysterious circumstances. He moves into the cottage with his wife Valerie. Harry discovers that several locals have been killed by mysterious snake bites. This is also found to have been the cause of Charles’s death. The origin of the snake killings appears to rest with Dr Franklyn who lives in the village mansion. As Harry investigates, he discovers that these are being caused by Franklyn’s daughter Anna who was abducted by a snake cult that Franklyn was researching in Borneo and that she now periodically transforms into a snake creature.