Last week, I asked which season finale has excited you most, but following a week that's seen the series finales for Lost, Law & Order, 24 and FlashForward, I'm thinking bigger. Which show's final episode made the biggest impact on you?

I'm not just thinking about this year, either (in part because, really, that's slim pickings - I was deeply unimpressed by the FlashForward finale); I'm talking any of the Star Treks, The X-Files, Battlestar Galactica on top of the shows that ended this season. Which finale not only didn't disappoint, but made you feel even better about the series as a whole?