S1·E18 The Dark! Fear of the Underhell
Aired August 3, 1996
Synopsis
Kotaro struggle to figure out a way to destroy Raphael! If Raphael keeps metamorphasizing, he'll absorb the entire planet! Kotaro has to figure out WHAT Raphael is and keep from being killed by his jailer in UnderHell! Meanwhile, Fou, must battle one of the Dark Knights to save Karin!Episode summary graciously provided by Vortex Fansubs