Episode 604

"The Aim is Building R! The Pirate Alliance's Great Assault!" is the 604th episode of the One Piece anime.

Anime Notes

 * When the poison gas engulfs the outside of the lab, the anime adds a scene with Caesar, Vergo, and Monet watching the video. Caesar laughs and comments on how the island is now uninhabitable.
 * In the manga, Law simply tells everyone to find the gate marked "R-66" while in the anime, Law explains the layout of the facility.
 * The anime adds a scene in which Luffy asks Robin for a favor.