Amanda's deathbed request to her son, John, was for him to destroy all the lab notes etc. from her last experiment. She also blurts out he had a brother. At the funeral John meets Melissa, who claims to be his mothers biggest fan. Together with some of John's friends they go to Amanda's house, but none are prepared for what they find there.
Actress Jane Wilkinson wants a divorce, but her husband, Lord Edgware, refuses. She convinces Hercule Poirot to use his famed tact and logic to make her case. Lord Edgware turns up murdered, a well-placed knife wound at the base of his neck. It will take the precise Poirot to sort out the lies from the alibis - and find the criminal before another victim dies.
Underwater deep-sea miners encounter a Soviet wreck and bring back a dangerous cargo to their base on the ocean floor with horrifying results. The crew of the mining base must fight to survive against a genetic mutation that hunts them down one by one.
McGriff and Albaby are probably doing the worst law enforcement job in the world - they are plain clothes U.S. military policemen on duty in war-time Saigon. However, their job becomes even harder when they start investigating the serial killings of local prostitutes. Their prime suspect is high ranking U.S. Army officer which brings their lives in danger.