I did not watch much tv over the christmas period, but one thing I was looking forward to was the 39 steps, seeing as the bbc were doing it I thought that it would be fairly good, what a dissapointment, and the worst aspect for me was when Hanney was staffed, it was by an aircraft which used interrupter gear which the RFC did not have until at least 1916, and it looked like a SE5a. How about your biggest let down.
I don't know about worst, but the biggest disappointment was The Royle Family, it lacked the natural but dry humour it is noted for. Definitely strained and clutching at the last straws of it's heyday... yet another reached and past it's watch-by date programme.
Whatever was the worst TV over Christmas, I didn't watch it. Being a World of Warcraft addict meant TV watching was avoided most of the time. My partner plays WoW just as much as me too, so the telly spends most of it's time switched off.
Nostalgia can be overdone but I miss the funny Christmas programmes of yesteryear such as The Two Ronnies, I used to get some good belly laughs from some of those while todays commedians seem less funny. Of course it could just be me getting old and crotchety.I get my laughs from books more now.