A cable comes from South Africa reporting that the son of Simeon’s partner was dead; Stephen Farr admits his name is Stephen Grant, and he is in England to meet his father, from Simeon's last trip to South Africa, five years after his marriage in England. After that, Pilar reveals the story of the death of the real Pilar as the two crossed Spain during its civil war, and her own plan to arrive in England in her stead. With this knowledge, Sugden tries to blame the murder on Pilar. Then Poirot takes over and explains the crime. Poirot reveals that Sugden was another illegitimate child of Simeon, from an affair with a local girl. Sugden hated the man who abandoned his mother, paying her off. Sugden planned his revenge carefully and murdered his father hours before he set off the noisy sound effects.