The Case of the Scorpion's Tail (1971) Sergio Martino

A plane explodes; one passenger is a London businessman who's insured for $1 million. His unfaithful wife is the beneficiary. The insurance agency arranges to pay, but also assigns their top investigator, Peter Lynch, to sniff out irregularities. The widow goes to Greece for the payout; Peter follows her, introducing himself. He becomes her protector and her companion, but the relationship is short lived. She has decided to take the money in cash and plans an immediate trip to Tokyo. Is she guilty of her husband's murder, and if so, who's her accomplice? An Athenian police inspector, an Interpol agent, and a French photojournalist join Lynch in the investigation.

"The Case of the Scorpion's Tail" has all the elements that are necessary in order to make an effective giallo movie. The story is standard giallo. When a man dies in a plane crash his wife (Ida Galli) collects a $1 million life insurance policy. The widow heads to Greece for the payout but a series of gruesome murders follow her. There are plenty of suspects, including a tenacious investigator (George Hilton) from the insurance agency and the widow's lover. Director Martino keeps the story moving at a fast pace while the viewer tries to guess the identity of the killer. Anita Strindberg (also memorable in "Your Vice Is a Locked Room and Only I Have the Key" and "Who Saw Her Die?") is a stunning-looking heroine. It's one of Martino's best films.