#221back #Sherlock #notkidding pic.twitter.com/iTfDqfJI0R

— BBC One (@BBCOne) November 25, 2014

Over the summer, Sherlock EPs Steven Moffat & Mark Gattiss made it official that they’re working on Series Four of the acclaimed BBC One show starring Benedict Cumberbatch and Martin Freeman. They also slipped that a 90-minute special is in the works, too. The tweet embedded above, featuring Detective Sherlock Holmes and his once-again (?!) mustached partner-in-solving-crime Dr. John Watson, is a first look at said special.

What’s in store? Moffat previously teased, “A special, plus a new series of three episodes – it’s a record-breaking run! Of course, it’s far too early to say what’s coming, but we’re reasonably confident that the very next thing to happen to Sherlock and John, is the very last thing you’d expect…”

Like Watson reprising his maligned mustached?! An airdate for the special has yet to be pinned, but rumors point to Christmas 2015.