It's Christmas time, there's no need to be afraid.  Oh, wait.  This is Doctor Who, of course there's a reason to be afraid.  "Last Christmas", Capaldi's first full Christmas special takes a que from real horror movies this year.  And gives us Santa Clause in the best way possible: Nick Frost!  Don't sleep thru this one, we're giving you our first impression of this years gift from Steven Moffat and the BBC.

WARNING: Contains spoilers