The Doctor (CaliBrothersStudios)

The Doctor is a time traveling alien.

History
The Doctor's history apparently mirrored that of his other counterparts.

Meeting the Company and Himself
The Doctor was tracking some Daleks across time and space, and he traced them to Middle-Earth. While chasing them, he ran into the Company. (LEGO Worlds Collide Prelude: Doctor Who/ The Hobbit - An Unexpected Episode)