Trailers for the third season have already revealed that the show's title character is alive and well, with other characters, including Martin Freeman's John Watson, learning of Holmes's return from the dead after a two-year absence.
The mini-episode, entitled ‘Many Happy Returns’, was written by ‘Sherlock’ producers Steven Moffat and Mark Gatiss.
‘Sherlock’ returns in the U.K. on New Year's Day and premieres in the U.S. on Jan. 19 on PBS Masterpiece.
Watch the full mini-episode below.