Bill and Stephanie are joined by film scholar Christopher Hoppe to unlock Sergio Martino’s Your Vice Is a Locked Room and Only I Have the Key (1972), a cornerstone of Giallo cinema, laced with gothic unease, which explores the cultural anxieties of 1970s Italy. The film follows a washed-up writer, his abused wife, and the arrival of his seductive niece, as secrets, betrayals, and murders spiral inside (and outside) a crumbling villa. Lurking over it all is the ghostly presence of the writer’s domineering mother, and watching with uncanny menace is the family’s black cat named (yes, really)...Satan.