One Piece - Episode 33

After helping Zoro escape, Nami is accused of treason by Arlong's officers. To prove her allegiance, she stabs Usopp in the stomach, causing him to fall into the pool.

Luffy, Sanji, and Yosaku finally reach the island with the help of the sea cow, Momoo, but their arrival is chaotic as their ship crashes into the forest, where they reunite with Zoro. One Piece Episode 33

Earlier in the episode, Zoro escapes his confinement after Arlong discovers the damage he caused to the base while Nami was secretly assisting him. Watch Guide & Trivia After helping Zoro escape, Nami is accused of

Watch a breakdown and reaction to the shocking events of Nami's apparent betrayal in this episode: Earlier in the episode, Zoro escapes his confinement

This episode is highly regarded for its "shock value," setting up the emotional backstory for Nami that is fully revealed in the subsequent episodes.