

Emily Boynton, the stepmother to three children, blackmails the family lawyer into destroying a second will of her late husband that would have freed the children from her dominating influence. She takes herself, the children, and her daughter-in-law on holiday to Europe and the Holy Land. At a dig, Emily is found dead and Hercule Poirot investigates.
Acting
Piper Laurie's matriarch from hell steals every frame.
Production
Petra locations so gorgeous they distract from the body count.

Director
Michael Winner
Trivia, insights & behind the scenes
Michael Winner later admitted he cast Lauren Bacall purely because he wanted to meet her, then rewrote the role to expand her screen time.
This was Ustinov's fourth and final theatrical Poirot—a role he inherited from Albert Finney, making him the longest-running film incarnation until Branagh.