Thanksgiving TV specials: Who does it best?

I don't envy script writers for shows that are well into their fourth and fifth seasons. Especially for shows that have a fairly rigid format (see Rules of Engagement, or any family-oriented sitcom), coming up with new material when you're approaching your 100th episode has to be a daunting task. However, I imagine a lot of these writers can take comfort in that out of a 13-episode season, there...