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4.50 from Paddington is a detective fiction novel by Agatha Christie, first published in November 1957.<ref>[https://en.wikipedia.org/wiki/4.50_from_Paddington Wikipedia] (retrieved 7 January 2017)</ref> A friend of Miss Marple's sees a woman being strangled in a passing train running parallel to her own. When police cannot find a body and doubt the story, Miss Marple enlists a professional housekeeper to go undercover.<ref>[http://www.imdb.com/title/tt0092497/ Internet Movie Database] (retrieved 7 January 2017)</ref> This version is a full length BBC TV movie from first broadcast on 25 February 1987 featuring Joan Hickson as Miss Marple.