Gallifrey One: 28 Years Later

Are Time Lords plausible? How is it possible to be a human/Time Lord hybrid (or worse, half-Dalek)? What effect would constant space/time travel have on the Doctor’s companions? And why do Nimons have horns, the Ood tentacles and Zygons… whatever it is they call those? We’ll have a lively discussion on the biological plausibility of the Doctor himself, his traveling companions, and the aliens we encounter on the show.