JoJo’s Bizarre Adventure: Diamond Is Unbreakable Episode 23 English Dubbed Episode Title:Sheer Heart Attack, Part 1 / Heart Attack, Part 1.Episode Description:Advising Koichi against recklessly chasing after the culprit, Jotaro goes up against Sheer Heart Attack, which proves to be resilient to Star Platinum's attacks. Ignoring Jotaro's warning, Koichi sends Echoes to search for Kira, only to find he can control Sheer Heart Attack from outside of Echoes' range, leaving him open to an attack from Sheer Heart Attack. Deducing that Sheer Heart Attack uses body temperature to determine its primary target, Jotaro uses a fire to lure it away from Koichi, but gets critically injured by its amplified explosion...