In addition to the Doctor Who round table, I also got to sit in on the Torchwood round table with the executive producer of all three WHO shows, and Torchwood star Naoko Mori (Toshiko).
At the time, I didn't realize that Julie Garder was executive producer of all three series - Doctor Who, Torchwood, and Sarah Jane Chronicles.
Torchwood is a spin-off of Doctor Who, but its edgier, made for a more adult audience. If you haven't seen it yet I suggest you check it out.
