Murder Ahoy was the fourth and final entry in the series of comedy whodunits starring Rutherford as Miss Marple. The series was doing well at the box office, but the producers were unable to get the rights to any more of Christie's works. In addition, this is the only one that wasn't adapted from a Christie novel and the film was produced in 1964, but released at the end of 1965 in order to space out the series. Following the end of the Miss Marple franchise, director Pollock would make one more feature before he more or less vanished from the scene. Another Christie, Ten Little Indians (see my review), for Fu Manchu producer Harry Alan Towers.
All in all, Murder Ahoy is fantastic light hearted fun with Rutherford on fine form as usual as the spinster detective. She gets good support from Lionel Jeffries as the Captain and Stringer Davis offers his touching portrayal as the local librarian Mr Stringer who is Miss Marple's closest friend and is always concerned that her meddling may result in her getting bumped off, but its never any use as she is determined to unravel the mystery and she does in her own inimitable fashion. Moments to savour here include her sword fight with the killer at the climax when she assures her assailant "I must warn you that in 1931 I was the winner of the ladies fencing championship." Screenwriters David Pursall and Jack Seddon came up with quite a good storyline of their own and the identity of the killer is well concealed until the end, but I felt that the script could of been a little tighter. Nevertheless, its all good fun and Rutherford has no trouble in dominating the film with her uniquely individual performance as Miss Marple, George Pollock's direction is smooth and the atmospheric black and white camera-work of Desmond Dickinson is an added bonus.