In BBC’s Sherlock, which episode features the villain Culverton Smith?

In BBC’s Sherlock, the villain Culverton Smith features in the episode “The Lying Detective.”

“The Lying Detective” is the second episode of series 4. It introduces Smith as a wealthy hospital philanthropist whose public image hides a murderous personality. Sherlock investigates him while suffering the effects of drug use and trying to force John Watson to confront the consequences of Mary Watson’s death.

Smith is played by Toby Jones, whose performance emphasises the contrast between the character’s friendly public persona and his private cruelty. Sherlock deliberately creates a situation in which Smith talks about his crimes, helping expose him to the police.

The title also reflects the episode’s uncertainty about truth and deception. Sherlock lies about his motives and condition, while Smith presents himself as an unusually generous man. The episode’s case is separate from the final Eurus Holmes storyline, which is explored in “The Final Problem.”