I’ve had a hand in a couple of Christmas sitcom specials in my time: Season 2’s Christmas episode of Miranda, The Perfect Christmas; and Bluestone 42’s Christmas special (which you can watch over on iPlayer in the UK, at least).
Sitcom Christmas specials have to be just another episode with all your favourite characters in all your favourite places. But it also has to be something a bit different.
There’s one rule you can’t normally break that you absolutely have to break at Christmas.
Over at Seen&Unseen, I’ve explain what that rule is and what makes a Christmas special so special.