Filming for the fourth series of BBC One drama Sherlock has begun, with the show returning to screens in the near future for three brand new episodes.
Sherlock Holmes returns to Britain in the beginning of the new series, whilst Doctor Watson and his wife Mary start preparing for their biggest challenge to-date - becoming parents for the first time.
Actor Benedict Cumberbatch said he's "genuinely thrilled to be back filming Sherlock with all the cast and crew. I can't wait for everyone to see season four. But you will have to wait... Though not for long... And it will be worth it."
Co-creators, writers and executive producers Steven Moffat and Mark Gatiss add: "Sherlock series four - here we go again! Whatever else we do, whever we all go, all roads lead back to Baker Street - and it always feels like coming home.
"Ghosts of the past are rising in the lives of Sherlock Holmes and John Watson bringing adventure, romance and terror in their wake. This is the story we've been telling from the beginning. A story about to reach its climax."
"It's taken a while to gather everyone together for series four," says Sue Vertue, executive producer at Hartswood Films: "but I can confidently say I think it will be well worth the wait!"
The first of the three new episodes will be directed by Rachel Talalay, who has worked in the past on The Flash, Doctor Who and The Wind in The Willows.
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