One Piece Episode 423 titled “Jigoku de Saikai!? Bara Bara no Mi no Nōryokusha!” means “A Reunion in Hell?! The Man Who Ate the Chop-Chop Fruit!” is aired on October 25, 2009.
In this episode, Hancock petrifies Domino and the camera snail just to allow Luffy to sneak out before Hancock submit to the search. After the frisking done they board the elevator together with Warden Magellan on Level 4 and Warden Magellan explain the different levels of the prison. Luffy and Buggy decides to team up to fight off the enemies.
Source: Veoh