In 1947, the renowned and still celebrated detective Sherlock Holmes is 93, retired and living in seclusion in Sussex with his housekeeper and her young son.
Aware that dementia is creeping up on him, Holmes is haunted by his final case whose unsatisfactory conclusion led to his retirement. Prompted by his recent trip to Japan, he attempts to reconstruct the evidence before his memory gives out.
Adaption from BBC Films of a novel by Mitch Cullin.
Mr Holmes – Saturday 8pm on BBC2