Episode 591

"Chopper Enraged - Master's Tyrannical Experiments" is the 591st episode of the One Piece anime.

Short Summary
The children are with the straw hats. Brownbeard is tied up. The children eats candy and turn crazy. They attack the straw hats and eventually Usopp uses his sleep star attack which makes them fall asleep. Law gives Smoker's heart to Caesar. Caesar sent Yeti Cool Brothers to deal with the straw hats and they don't miss a single target.

Characters in Order of Appearance

 * Chopper
 * Sanji
 * Brook
 * Brownbeard
 * Usopp
 * Luffy
 * Zoro
 * Nami
 * Samurai (flashback)
 * Doran
 * Mocha
 * Sind
 * Biyo
 * Caesar
 * Law
 * Monet
 * Scotch
 * Rock

Anime Notes

 * The FUNimation simulcast did not use the new opening in this episode, due to copyright issues.
 * Scene with children and them getting sick extended.
 * Yeti Cool brother introduction extended.
 * Chopper, Franky and Brook think of Master as a hero or savior extended.