

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.
Acting
McKellen's physicality ages Holmes without makeup tricks.
Cinematography
Honey-drenched Sussex coast vs. fog-choked Japan flashbacks.
Writing
Holmes finally admits feelings—devastatingly.

Director
Bill Condon
Trivia, insights & behind the scenes
McKellen played both Sherlock AND Watson in his career (1976 BBC radio).
Condon directed Gods and Monsters (1998), another McKellen film about a genius facing death—this is their elegiac reunion.