Santa meets Sherlock? Steven Moffat doesn't think that's a great idea

Now that Santa Claus has gotten around to all good boys and girls worldwide — if you didn't get anything, maybe think about your place on the "naughty" list in 2015 — the big man with the beard is getting his sci-fi on tonight in BBC America's Doctor Who Christmas special, penned by showrunner Steven Moffat.

Nick Frost steps into the ho-ho-holiday role opposite the current Doctor, played by Peter Capaldi, but we asked Moffat how his "cockney gangster Santa" would do having a Tumblr-imploding meet-up with Benedict Cumberbatch on Moffat's other British hit Sherlock:
"I don’t think it would work honestly. (Laughs) Doctor Who is a very different kind of show, You can more or less bring anything into Doctor who you want provided you explain it properly. It has a magical, fantastical, science-fictional side to it. Sherlock? If Santa Claus turned up in Sherlock, he might have a problem with that."
Moffat hasn't had much time for holiday festivities with a new season of Doctor Who and a Sherlock special both starting production in Europe the first week of January. However, the stress of both shows is now old hat to him.
"I remember how terrified I was the first year with my first series of Doctor Who going out and a month later my first series of Sherlock. I remember just thinking, 'God, if I screw both those up, that’s all of British culture destroyed. I kill Daniel Craig and it’s finished.' Now I've gotten used to the relentlessness of that terrifying pressure."
Speaking of hats, Cumberbatch's quirky modern-day detective and Martin Freeman's John Watson were both seen in odd-for-them period headwear in a November publicity shot, and Moffat teases that Victorian gear plays a role in next year's maybe-Christmas-but-maybe-not Sherlock special.

"I invite you to consider what on Earth is going on there. We’ll be filming it soon and it’ll be a tiny bit clearer what we’re up to."