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.
199 Episodes
2005
13 Episodes
2006
2007
2008
2010
2011
2012
12 Episodes
2014
2015
2017
10 Episodes
2018
2020
6 Episodes
2021