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.

Dangerously ill with a rare blood disorder, and determined to save others suffering his same fate, Dr. Morbius attempts a desperate gamble. What at first appears to be a radical success soon ...

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 ...

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