Murder Ahoy! (1964)

Recently installed as a member of a Trust that oversees the rehabilitation of young criminals, Miss Jane Marple (Margaret Rutherford) witnesses the murder of a fellow trustee (Henry B. Longhurst). She suspects he was killed because he saw or found something on a recent visit to a ship that houses the wayward youths. She takes it upon herself to visit the ship to find out what was discovered and lead to his death. Directed by George Pollock (MURDER SHE SAID), this was the fourth and final film in the Margaret Rutherford as Agatha Christie's Miss Marple series. Unlike the previous three movies however, this was not based on a Christie novel but was an original screenplay. It's the weakest of the four films. As marvelous as she is in these movies, Rutherford is not Christie's Miss Marple as any reader of Christie will know and these films often placed Miss Marple in situations that Christie would never condone in her books. For example, the movie has Miss Marple in a duel with swords with the movie's villain toward the end. The mind shudders! One could put up with all of that if the mystery were clever or fun but it's dull and trite. With Lionel Jeffries, Charles Tingwell, Stringer Davis and Derek Nimmo.