The series, which brings Arthur Conan Doyle’s Sherlock Holmes into the present-day, will return for a further run of three stories: A Scandal In Belgravia, The Hounds Of Baskerville and The Reichenbach Fall.
The titles were revealed by co-creator Steven Moffat in a BBC statement.
Benedict Cumberbatch and Martin Freeman return as Sherlock and Watson respectively alongside Rupert Graves as Inspector Lestrade and Una Stubbs as landlady Mrs Hudson.
The episodes will be filmed on location in London and Cardiff.
“The hotly anticipated return of BBC One’s hit series Sherlock begins
filming this week with Benedict Cumberbatch and Martin Freeman in fine form,” says Ben Stephenson, Controller of Drama Commissioning.
The series is up for three BAFTAs – Leading Actor, Supporting Actor and Drama Series – later this month and is also a contender for the YouTube Audience Award.