The Evil Within Demon's Head Castle is the eighty-fifth episode of the InuYasha anime.
- Inuyasha and his friends meet an old exorcist and she tells them of the curse of the demon's head castle, where the head of a demon was supposedly buried underneath.
- They all go to the castle to investigate, and find that the lord has likely been possessed; they learn that a massive demonic aura is surrounding the castle, though the exorcist is unable to sense it.
- Many monks and priestesses have tried to exorcise the demon before, but with no success.
- The princess of the castle takes Miroku down to where the demon's head had been buried; it is revealed that she is actually the demon, and lured him down there to devour him.
Inuyasha and his friends run into an old woman, Madame Exorcist, fighting a demon and save her. After she introduces herself as a demon exorcist, they decide to join her to fight an oni haunting a nearby village.
Characters in Order of Appearance
- Opening Theme — Owarinai Yume — TV OST Vol. 3
- Inuyasha recalls how Naraku disappeared — Like a Storm (Shippū no Gotoku) — TV OST Vol. 2
- Priestess exorcises weasel demon — Shōki — TV OST Vol. 2
- Priestess says there is an increase in demons — Dead Soul (Shinidama) — TV OST Vol. 1
- Lord senses girl spying on him, he kills her — Tsubaki the Dark Miko (Kuromiko Tsubaki) — TV OST Vol. 2
- The girl’s corpse is carried outside — Sign of Unrest (Fuon na Kehai) — TV OST Vol. 1
- The demon head appears, Sango’s Hiraikotsu does not work — Fierce Fighting (Gekitō) — TV OST Vol. 2
- Inuyasha’s Wind Scar fails again, Miroku exorcises the demon — Ryūkotsusei Resurrected (Yomigaeru Ryūkotsusei) — TV OST Vol. 2
- Castle servant guides Inuyasha, Miroku says the lord is a human — Demon Brother Sesshōmaru (Yōkei Sesshōmaru) — TV OST Vol. 1
- Miroku tells Sango he still likes her — Osuwari! — TV OST Vol. 1
- Miroku walks with the princess down the stairs — Evil Spirits Desiring the Shikon no Tama (Shikon no Tama o Nerau Chimimōryō) — TV OST Vol. 1
- Miroku sees the bones of priests — Sign of Unrest (Fuon na Kehai) — TV OST Vol. 1
- Lord starts attacking castle people; Miroku reveals the princess’ demonic self and Inuyasha prepares to fight the lord — Inuyasha’s Metamorphosis (Hengeshita Inuyasha) — TV OST Vol. 2
- Ending Theme — Every Heart — TV OST Vol. 3
- Madame Exorcist may have truly been one in her prime, but it seems her spiritual powers and awareness have left her in her old age.