YMMV / Poirot S 12 E 02 Halloween Party

• Complete Monster: Michael Garfield is the seemingly friendly garden caretaker for Rowena Drake but is in fact a narcissistic sociopath trying to obtain her family's inheritance. Seducing her and manipulating her to help him with his crimes, Michael killed Rowena's husband and helped her poison her aunt to help gain the inheritance. Michael then forced Leslie Ferrie to forge a fake will before killing him once he has it. When caught by Poirot, Michael tries to kill everyone present, including his and Rowena's daughter. Despite Rowena genuinely loving Michael, Michael reveals he only used her for his own desires and planned to abandon her as a scapegoat for the crimes.