Episode 422: A deadly Infiltration! The Underwater Prison Impel Down!
One Piece Episode 422 „A deadly Infiltration! The Underwater Prison Impel Down!“. Adapts chapters 525–526. First aired: 2009-10-18.
- Read on in the manga from: Chapter 527 (Volume 54 – No One Can Stop This Now)
- Title (Japanese): 決死の潜入！海底監獄インペルダウン
- Title (romaji): Kesshi no Sennyū! Kaitei Kangoku Inperu Daun
- First aired (Japanese): 2009-10-18
- First aired (German): 2014-10-17
- Category: Story
- Arc: Impel Down Arc
- Chapters adapted: Chapters 525; Chapters 526, pages 3-6