In 1947, long-retired and near the end of his life, Sherlock Holmes grapples with an unreliable memory and must rely on his housekeeper's son as he revisits the still-unsolved case that led to his retirement. Ian McKellen, Laura Linney, Milo Parker, Hiroyuki Sanada, Roger Allam, Frances de la Tour, Hattie Morahan Added on Amazon Prime 2021-01-16. Youtube Trailer