Tongues were set wagging when a photo was released featuring Sherlock (Benedict Cumberbatch) and Watson (Martin Freeman) dressed in full period costume.
Now Sherlock co-writer Steven Moffat has confirmed the episode will be set in the 19th century in an interview with Entertainment Weekly.
He said: “The special is its own thing. We wouldn’t have done the story we’re doing, and the way we’re doing it, if we didn’t have his special.”
“It’s not part of the run of three episodes. So we had this to do it – as we could hardly conceal – it’s Victorian.”
Cast have also been spotted filming in a mocked-up Victorian set in Bristol.
Making use of the road’s cobbled surface, the crew added old-fashioned pub signs to buildings, recruited horses and carts ensured any anachronisms could be carefully edited out by erecting a huge green screen.
Even Sherlock’s iconic deerstalker hat and pipe have been spotted once or twice.
Steven added filming had been completed on the special and he was “very pleased” with the result.
Excited fans were quick to take to Twitter to react to the news.
“Can’t wait for Sherlock in victorian England 🙂 🙂 super excited,” wrote one user.
Another added: “Very excited to finally have official confirmation that the new one-off special will be a standalone story set in Victorian times. #Sherlock.”
One fan simply stated they were “Beyond EXCITED!!!”
The BBC has yet to confirm when the Victorian Sherlock special will be broadcast.
By Annie Price