Mr. Holmes is a 2015 mystery film directed by Bill Condon, based on Mitch Cullin's 2005 novel A Slight Trick of the Mind, and featuring the character Sherlock Holmes. The film stars Ian McKellen as Sherlock Holmes, Laura Linney as his housekeeper Mrs. Munro and Milo Parker as her son Roger. Set primarily during his retirement in Sussex, the film follows a 93-year-old Holmes who struggles to recall the details of his final case because his mind is slowly deteriorating.

Plot

In 1947, the long-retired Sherlock Holmes, aged 93, lives in a rural Sussex farmhouse with his widowed housekeeper Mrs Munro and her young son Roger. Having just returned from a trip to Hiroshima, Holmes starts to use a prickly ash plant he acquired there to try to improve his failing memory. Unhappy about Watson's fictionalisation of his last case, The Adventure of the Dove Grey Glove, he hopes to write his own account, but has trouble recalling the events. As Holmes spends time with Roger, showing him how to take care of the bees in the farmhouse's apiary, he comes to appreciate Roger's curiosity and intelligence and develops a paternal liking for him.