We learn new details about the upcoming BBC episode. Story by Matt Cummings For those who haven't yet checked out the BBC series Sherlock , it's probably time you did. The series which cemented Actors Benedict Cumberbatch and Martin Freeman as superstars follows Sherlock Holmes on modernized adaptations of the books by Sir Arthur Conan Doyle. The latest episode, tentatively titled The Christmas Special , now features the clip below. As you can see, show co-runner Stephen Moffat has taken Watson and Holmes back to Victorian England with Watson donning quite a mustache. Check out the video and read more afterwards: It's clear that the team has missed a step since exiting season 3 , with Cumberbatch wearing the hat and cape quite well. Freeman's mustache, the fun bantering with Mrs. Hudson (Una Stubbs), and Cumberbatch's "That’s the trouble with dismembered country squires: they’re notoriously difficult to schedule” reminds us why this short ser