Ever wanted to know what was really going on during the final seasons of time-travel show Doctor Who's original run? When it got all mystifying, with the darkly significant Victorian chambermaids and hints about the Doctor's secret past? Now you can ask Sylvester McCoy, who starred in those episodes, and Andrew Cartmel, who was in charge of the scripts, what was the deal. They're both appearing at Gallifrey One, an annual convention in Los Angeles, this weekend. Also appearing: a few writers for the new series and Mojo, who does visual effects for Battlestar Galactica. [Gallifrey One, via Justin]