Legend of the Boneknapper Dreamworks How to Train Your Dragon Legends : Season 1 Episode 3

After Gobber is convinced his nemesis, the legendary Boneknapper, is responsible for burning his house down, Hiccup and the Viking gang join Gobber in hunting down the dragon once and for all. When the gang finds themselves shipwrecked on the suspected island of the beast, they are about to learn the truth about the Boneknapper.