When Benedict Cumberbatch was photographed dressed up as original-recipe Sherlock for “Sherlock’s” upcoming special episode, we wondered: Was it time travel? A dream sequence? A masterful bit of trolling? Now, thanks to Steven Moffat, we have our answer: None of the above! As it turns out, the entire special will be set in the 1800s, and none of it is canon. “The special is its own thing,” Moffat told EW. “We wanted to do [a Victorian version of “Sherlock”], but it had to be a special, it had to be a separate entity on its own. It’s kind of in its own little bubble.” We look forward to seeing how the “Sherlock” team will un-update the classic Doyle stories for the old millennium.