The sleuth investigates the disappearance of a cook, a body is found in Captain Hastings' garage, and a man receives threatening letters.
Poirot meets an accident-prone woman, tackles a blackmailer, and searches for a missing man.
One of Hastings' friends is murdered, a murder gives rise to rumours of a communist conspiracy, and the sleuth accompanies a precious cargo to New York.
An archaeologist is found dead, a wealthy industrialist is murdered, and an unsolved case resurfaces.
A rich industrialist is murdered in a picturesque village, and an actress's estranged husband is murdered.
Poirot investigates a cleaner's death, a schoolgirl is embroiled in a mystery, and the death of a former nanny is connected to a troubled heiress.