Trivia

Miss Jane Marple's audition piece for the Cosgood Players is her dramatic rendering of "The Shooting of Dan McGrew", a 1907 poem by Robert W. Service. Dame Margaret Rutherford was especially fond of the piece and reportedly once intended to give a reading of it at a women's prison to cheer up the inmates.

Like Murder at the Gallop (1963), this movie was adapted from an Hercule Poirot novel, the 1952 book "Mrs. McGinty's Dead".

While inspecting the contents of the victim's suitcase, Miss Jane Marple finds fliers for a theatrical production of Dame Agatha Christie's "Murder She Said"; this is the title of the first movie in which Dame Margaret Rutherford appeared as Miss Marple and is an in-joke as, despite Jim Stringer's (Stringer Davis) claim that it's "an excellent play", Christie wrote no such work. Some foreign-language prints give the play's title as "4.50 from Paddington", though this 1957 story - whilst being the origin of the first Rutherford film - was never adapted for the stage either.

This was the penultimate production in the franchise of four movies with Dame Margaret Rutherford as Miss Jane Marple. The last is Murder Ahoy (1964). After the series concluded, Rutherford and her husband Stringer Davis reprised their roles of Miss Jane Marple and Mr. Jim Stringer only once more, for a brief cameo appearance in The Alphabet Murders (1965).

H. Driffold Cosgood (Ron Moody) hopes for a play-run longer than "The Mousetrap" - Dame Agatha Christie's famous stage play, which has been in continuous performance since 1952, the same year that source novel "Mrs. McGinty's Dead" was published.