Doctor Who: When did it first air? How many seasons and episodes are there? What's the episode duration of "Doctor Who", and where can you watch it? Find out all this and more!
The Doctor is a Time Lord: a 900 year old alien with 2 hearts, part of a gifted civilization who mastered time travel. The Doctor saves planets for a living—more of a hobby actually, and the Doctor’s very, very good at it.