Legend of the Boneknapper Dragon is a 2010 American computer-animated short film produced by DreamWorks Animation and set within the How to Train Your Dragon universe. The film features most of the cast from the original film reprising their roles, and follows Hiccup and his young fellows accompanying their mentor, Gobber, on a quest to kill the legendary Boneknapper Dragon. It originally aired on television via Cartoon Network on October 14, 2010, and was released as a special feature on Blu-ray and double DVD editions of How to Train Your Dragon the next day.