Teen Titans Go! Season 4 Episode 41 Throne of Bones Episode Title:Throne of Bones.Episode Description:When the Titans end up going to a heavy metal concert instead of what they thought was a smooth jazz concert, the heavy metal takes over the Titans (except Robin). After playing a heavy metal record backwards despite Robin's warnings, the other Titans end up in Metalworld, a world full of heavy metal, so Robin must go in after them.