Episode 305

"The Terrifying Past! Dark Justice and Rob Lucci" is the 305th episode of the One Piece anime, and takes place during the Enies Lobby arc.

Short Summary
After receiving the impact from Luffy's Gigant Pistol, Lucci barely manages to get up, thus continuing his fight with the Straw Hat captain. We also find out about the sadistic CP9 agent's past thanks to Vice-Admiral Doberman, of how Lucci became the enforcer of his "dark justice."