Episode 17 (2011)

Trap × in the × Hole is the 17th episode of the 2011 anime of Hunter × Hunter.

Killua confronts the Amori Brothers and steals their tags while Hanzo is trailing them. Gon finds Leorio and Kurapika and helps them find Ponzu's hideout. Leorio is trapped inside when Kurapika and Gon rush in to help him. But the find out that Burbon's snakes are blocking the exit and Burbon is already dead

Differences between the Anime and the Manga

 * In the manga, it's implied that Killua doesn't realize that Hanzo to be watching him and the others from behind. It seems like Hanzo snatches badge 198 instead of 197 by his own mistake, though this is never actually stated.