Episode one is set to air on New Year's Day. Written by Mark Gatiss, Sherlock (the ever glorious Benedict Cumberbatch) returns to our screens, awaiting to see where, and how, the finally definitely dead Moriarty (Andrew Scott) will make his posthumous move.
It may not be Moriaty (but then again maybe it is), but something strange is indeed afoot: a mystery that's baffling Scotland Yard, although Sherlock is distracted by seemingly irrelevant details.
Mary Watson (Amanda Abbington)'s explosive past may be dragged back into the light, there's a madman on the loose and someone is destroying images of the late Prime Minster Margaret Thatcher. Worst of all, there are a couple of disturbing new arrivals: a baby (whose name was announced in the Telegraph this month) -- Rosamund Mary Watson -- and Culverton Smith (Toby Jones) who has been described the the writer as 'the darkest villain we've ever written'.
Martin Freeman returns as John Watson, Mark Gatiss as Mycroft, Rupert Graves as Inspector Lestrade, Una Stubbs as Mrs Hudson, Amanda Abbington as Mary Watson and Louise Brealey as Molly Hooper.
| What | Sherlock Season 4: everything you need to know |
| Where | BBC1 | MAP |
| When |
On 01 Jan 17, Episode one: 1 January 8:30pm On 14 Jan 17, 9:00 PM – 10:00 PM |
| Price | £n/a |
| Website | Click here for more from the BBC |
