The Seducers (1969)

A wealthy English lord is suffering a mental breakdown following the death of his red-headed wife, Evelyn, whom he feared was cheating on him. He tours local bars and dives, scouring for lovely red-heads willing to come back to his decaying castle in the country, where he seduces them, then tortures and kills them. His friend the doctor talks him into marrying again to help heal his slowly-rotting mind, which he does--but are the doctor's orders really what he needs?

A young man visits his ancestral home accompanied by his guardian and their wives, where he is plagued by the memories and influence of his murderous, psychosexual father.

Professor Ricardo Rossi is an uncompromising moralist and a paladin of Catholic morals. He is understandably baffled when he finds his wife Elisa in bed with another woman (whom Rossi mistakens for a man). Furious, he poisons his wife and throws her body into a lake, then brings home a prostitute, Eva, to replace her. He also begins an affair with his niece Barbara. But Elisa is not dead, as Rossi soon finds and she is plotting with Eva to get rid of him. Rossi is more precise this time and shoots the two women dead. However, there is a complication and more deaths ensue...

During an outbreak of violent murders in the area targeting young women, a journalist searching for a female friend gone missing ends up in a villa owned by an eccentric photographer.

Following the death of her grandfather, Valentina settles with her husband Pierre, a sculptor, in the old family villa which she partly inherited (half of it belongs to her cousin Marta, who already resides there). Co-habitation proves to be awkward: Valentina is unscrupulous and uninhibited, while Marta is austere and virtuous - at least, on the surface. In fact, when Valentina suddenly dies, the woman initiates a seduction which eventually coaxes Pierre into her arms. The cosy situation soon changes when a police officer turns up to investigate Valentina's death...

Nine members of an extremely rich and hateful family have decided to have a reunion on a remote island in the Mediterranean. No sooner than their arrival, old grudges, resentments, and feuds make themselves known, along with allusions to some more macabre events in their past. But when their boats are sabotaged, thus stranding them without any connection to the mainland, it becomes clear that someone is not willing to let old wounds heal, a fact made all the more clear as bodies start to pile up...

Edward Sacchi is a wealthy and apparently content married man but underneath he is driven by a desire to seduce and discard women. One of his conquests, Lucy, falls in love with him and when spurned, commits suicide. Edward is shocked but continues as before. Each of his lovers are subsequently murdered and he is arrested. However, his wife saves him by arranging an appointment with the real killer...

James, an unscrupulous director, and George are the joint owners of a film studio. One morning, the corpse of a messenger boy is found by a cleaning lady, but the identity of the youth's killer remains a mystery. Gloria, a stunning actress who is seeing George, rejects unwelcome advances from James. Determined to get the attractive actress into bed, James reveals that he has video footage which shows her killing the messenger. It emerges that she murdered the young man after he tried to sexually assault her. However, there is a twist...

Professor Brecht, a renowned scientist, is obsessively experimenting in his isolated villa. The object of his studies is "apparent death", with the intention that the human body in a cataleptic state can be cured more easily. He lives with his wife Lisa and several other people: his twin brother Germano; Katia, the waitress; Lailo, his assistant and young student Erina. Having discovered his brother's affair with Lisa, Brecht sets up a plan to kill Germano and take his place. The shock makes Erina dumb. Bercht's persecution of Lisa soon turns the woman mad, while Lailo, wandering in the villa's surroundings, vainly tries to find the key to the mystery. A psychiatrist, Louis, firmly believes Lailo's madness is caused by her inner anguish and seems confident in her recovery. But he's wrong: the demented woman kills Katia and then throws herself out of a window. Brecht takes back his own identity, but his actions will have further tragic consequences...

Events take a sinister turn one night in London, when two very different couples arrive at a double-booked apartment. Actions have consequences and not all debts are paid for with money. Leaving, it's harder than you think.

Three individuals try to survive the night, the masked killer, and each other.

Diamonds and switchblades are a girl's best friend. Inspired by Mario Bava's Blood and Black Lace, Edgar Wright's Last Night in Soho and many many sleazy gialli of the 70s.