Episode 302

"Robin's Liberation! Luffy vs Lucci: Peak of the Decisive Battle" is the 302nd episode of the One Piece anime.

Short Summary
Nico Robin and Franky take down some Marines, while the fight between Luffy and Rob Lucci continues, the Gear Second effect finishes.

Long Summary
Freed from her sea stone handcuffs by Franky, Robin returns to her normal self. With no way back, the two decide to capture the ship Spandam had intended to use to bring Robin to the Marine headquarters. The Buster Call ships arrive and start by shooting at the Tower of Justice, causing its dangerously positioned upper half to crush down into the waterfall. The resulting loud noise created reaches Luffy and Lucci beneath the Bridge of Hesitation. Anticipating that the Straw Hats would emerge through the underground passage, Lucci tears a hole into a wall of the underwater chamber, flooding it and the passage.