InuYasha Episode 51: Inuyasha`s Soul, Devoured
Episode 51 of 167 of InuYasha, aired November 19, 2001, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Sesshomaru learns from the wise tree-demon, Boku'seno that when Inuyasha transforms into a demon, his demon blood takes full control turning him into a mindless killing machine. Elsewhere, Inuyasha and the others arrive at a village that is ruthlessly being held under the control of the Moth Demon, Gatenmaru and his band of thieves.