Regeneration on Doctor Who allowed the Time Lord to change face. From William Hartnell to Tom Baker to David Tennant, here is every incarnation.

So while he's only been defeated by the Doctor three times before - a small number, really - it's enough for Morbius to want to track down our favorite Time Lord and destroy him completely.

Doctor Who (1963–1996) — Season 13, The Brain of Morbius: Part 4 The Doctor challenges Morbius to a terrifying mental duel which will lead to death! BBC One ...