Episode 342: Mystery of the Zombies! Hogback's Nightmarish Research Laboratory
One Piece Episode 342 „Mystery of the Zombies! Hogback's Nightmarish Research Laboratory“. Adapts chapters 447–449. First aired: 2008-02-10.
- Read on in the manga from: Chapter 450 (Volume 47 – Cloudy, Partly Bony)
- Title (Japanese): ゾンビの謎！悪夢のホグバック研究所
- Title (romaji): Zonbi no Nazo! Akumu no Hogubakku Kenkyūjo
- First aired (Japanese): 2008-02-10
- First aired (German): 2009-12-10
- Category: Story
- Arc: Thriller Bark Arc
- Chapters adapted: Chapters 447, pages 17-19; Chapters 448, pages 1-15; Chapters 449, pages 3-7