I know I've grumbled a lot about the last few series of Doctor Who, but even I think some people must be automatically programmed to complain about it, given the stream of insults I saw hurled at "Last Christmas" on Twitter the minute it ended - I actually thought it was one of the best Christmas specials in ages. Of course, one of my friends turns out to have some kind of notoriety among Whovians, as the person who more or less invented complaining about Doctor Who in the 1970s, so perhaps it was inevitable I'd hear grumbling.
"Last Christmas" by Steven Moffat, directed by Paul Wilmshurst. Spoilers after the cut.