The SoulTaker: Tamashii-gari - episode 10 - 12 Jun, 2001

Runa's signal has been lost and a strange underwater entity has told Yui to cut off their ties with the aliens. Meanwhile, Kyosuke decides to fight his father, Richard Vincent, but Komugi tries to talk him out of it. He later encounters the Director of the Hospital, who transforms into the SoulCrusher and the two engage in a violent battle to the death. (Source: Wikipedia)