Who would have thought the panel for a 10-year-old TV show would be the shindig that would have TV fans and industry insiders buzzing the most this year? Well, for starters, the thousands of Browncoats who lined up to fill Ballroom 20, many of whom camped overnight. So as we say farewell to Comic-Con 2012, here’s a behind-the-scenes shot from Science Channel’s reunion taping. Creator Joss Whedon and stars Nathan Fillion and Alan Tudyk share a smile while watching, well, themselves — a decade ago. The trio were getting their first look at the cable network’s retrospective Firefly teaser video that played before the panel. We’ve already posted a bunch of Firefly reunion pics, but this is a mighty final shot: