While we know that the new Christmas special of BBC’s Sherlock is set in the 19th century. We don’t know too many details about this Mark Gatiss and Steven Moffat creation. Aside from seeing them in their Victorian garb (and John Watson’s moustache comeback), we sense the somewhat darker mood of the show. There is a mystery to be solved as we can see but aside from that, there isn’t much we can say. But, of course, it isn’t Sherlock without a few jokes and potshots at the leads’ expense, like Holmes’ famous hat.
Source: Slate