text: Via a request for similar cases to the current one, Poirot receives from Surrey police details on the strangulation of Alice Corrigan – her body was found by a local teacher at a time for which her husband Edward had an alibi. Poirot is supplied with a photo of both people. Bringing together the suspects, Poirot denounces Patrick and Christine Redfern for Arlena's murder. She had been killed to prevent her husband learning that she had been conned by Patrick into investing a large inheritance towards "fabulous opportunities". The murder was well-planned to falsify the time of death. While Christine was at Gull Cove with Linda, she set Linda's watch forward twenty minutes, asked for the time to set her alibi, then returned the watch to the correct time. Afterwards, Christine returned to her room and applied fake suntan makeup, which she concealed from sight, before tossing the bottle out the window. Sneaking out to Pixy Cove, Christine made certain Arlena saw her; Patrick had instructed Arlena to hide should his wife turn up before their rendezvous. Once Arlena had hidden in the cave, Christine impersonated the dead body to fool Brewster, who immediately left to get help while Patrick remained behind. After Brewster's departure, Christine rushed back to the hotel to remove the makeup. Patrick then called an unsuspecting Arlena out and strangled her.