Five Little Pigs (S09E01)

Lucy Crale enlists Poirot's expertise to investigate the murder of her father, which occurred sixteen years earlier. As Poirot delves into the case, he uncovers several potential suspects who remain alive, each with their own motives and stories. The investigation leads him through a complex web of memories and secrets, as he seeks to uncover the truth behind the tragic event that has haunted Lucy's life for so long.