His Last Vow

"His Last Vow" is the third episode of the third series of the BBC Television series Sherlock, which follows the modern-day adventures of Sherlock Holmes. The episode was first broadcast on 12 January 2014, on BBC One and Channel One. It was written by Steven Moffat and directed by Nick Hurran with music composed by Michael Price and David Arnold. The episode is a contemporary adaptation of Sir Arthur Conan Doyle's short story "The Adventure of Charles Augustus Milverton".

In the episode, Sherlock Holmes (Benedict Cumberbatch) and John Watson (Martin Freeman) take on a case about stolen letters. This leads the pair into conflict with Charles Augustus Magnussen (Lars Mikkelsen), a media mogul specialising in blackmail whom Sherlock despises. Holmes and Watson try to get Magnussen arrested, but their attempt fails when they confront him at Appledore, Magnussen's home.

On its first broadcast on BBC One, the episode received 11.37 million viewers, a 32.1% audience share. Although this was a drop from "The Sign of Three" and "The Empty Hearse", it became the most tweeted-about single episode of a drama series in the UK. The episode received critical acclaim, and Mikkelsen's performance as Magnussen, in particular, was praised. For their performances in the episode, Cumberbatch and Freeman both won the Emmy Awards for Outstanding Lead Actor in a Miniseries or a Movie and Outstanding Supporting Actor in a Miniseries or a Movie, respectively. Moffat also won the Primetime Emmy Award for Outstanding Writing for a Miniseries, Movie or a Dramatic Special for his work on the episode.