Hades! A Surprising Possession
Pandora tells Radamanthys to be silent, that they shouldn't tell Hades everything that happens in the world of the dead. Source: crunchyroll
Aired 18/02/2006EP 5 - Hades! A Surprising Possession
2005
Saint Seiya: The Hades Chapter - Inferno
Seiya and the rest of the Bronze and Gold Saints who have survived the Sanctuary battle have entered the world of the Dead. They are fighting to get to Hades and defeat him.
(Source: Anime News Network)