Lady in the Lake

In Acapulco, Hercule Poirot attends a dinner party in which one of the guests clutches his throat and suddenly dies. The causes seem to be natural until another party with most of the same guests produces another corpse.

A falsely convicted man's wife, Catherine, and an alcoholic composer and pianist, Martin, team up in an attempt to clear her husband of the murder of a blonde singer, who is Martin's wife.

Wisecracking reporter Carl Kolchak investigates a string of murders in Las Vegas and suspects the culprit is a vampire. His editor thinks he's crazy and the police think he's a nuisance, so Kolchak takes matters into his own hands.

A murderer is brought to court and only Miss Marple is unconvinced of his guilt. Once again she begins her own investigation.