While ‘Sherlock’ will not be coming back to the small screen for a full season this year, fans will still get a glimpse of Benedict Cumberbatch and Martin Freeman as they star as Holmes and Watson in an upcoming ‘Sherlock’ Christmas special.

Such BBC event was previously teased with a still showing the fan-fave duo wearing outfits that seemingly belong to the Victorian era. Now, the Christmas special’s first official promo image has exclusively been released.

'Sherlock' Christmas special featuring Martin Freeman and Benedict Cumberbatch
'Sherlock' Christmas special featuring Martin Freeman and Benedict Cumberbatch

‘Sherlock’ is also expected to be present at Comic-Con this week, with its panel being comprised of executive producers Steven Moffat and Sue Vertue along with Rupert Graves, who plays DI Lestrade.

In an interview with UK’s Express, Moffat already teased what is coming for the well-known resident of 221B Baker Street in the Christmas special.

“The first few days we were just so excited because we saw our show with Benedict and Martin in the proper gear and his extraordinary sideburns and you think ‘why didn’t we always do this? Why did we make that silly mistake of updating it?'” Moffat said.

He also mentioned doing another version, including a German special, saying: “By the end we slightly missed the modern iteration. Maybe we’ll just alternate them all. Mark [Gatiss] and I think we should do the 1940’s propaganda German version.”

A fourth season of BBC’s hit crime drama series will reportedly go into production next year for an official premiere in 2017, although details are yet to be announced.

“We’ve got a clear idea of what we’re going to do and it’s going to be a clear shift in tone,” Moffat shared about the fourth season. “Yes, there’s going to be some dark stuff coming but there always is.”

Aside from a darker tone, the TV writer and producer also assured fans that the same elements present in the previous seasons can still be expected from the new series.

“There always fun and jokes and detection and all that nonsense. It’s dark in some ways – obviously it’s great fun and a Sherlock Holmes romp and all that – but there’s a sense of things coming back to bite you,” Moffat added.

After making its debut in 2010, ‘Sherlock’ established a pattern of three episodes with 90 minutes each per series. The last episode titled ‘His Last Vow’ ended the third series with a seat-gripping event as it teased the return of villain Jim Moriarty, played by Andrew Scott.

Currently known only as ‘Sherlock Special,’ the upcoming episode is penned by series creators Moffat and Mark Gatiss, and is scheduled for a release this December.