Eureka: Oh, Little Town (2010)
Yeah, this one was really slow at times. Fortunately, there were enough clever moments and fun ideas to pick up the slack. The episode took an interesting approach to the legend of Santa Claus, all the while dealing with your requisite Christmas cliches. Fortunately, it offered a twist to just about everything going on, and there were some great jokes.
As for the rest, I can't speculate whether I'd have liked it better if I knew the characters or premise. Regardless, seeing as this is up free of charge on Hulu, I'm going to recommend it if you're looking for some light SF this holiday season. It's a long way from perfect, but it's worth watching.