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.
2016
1992
2021
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2017
2024
2019
1996
2002
2007
2012
1993
2023
2025
2015