actualy there is another show, its called Dragons defenders of berk and Dragons riders of berk. they were on cartoon network, but you can get them on DVD. in my opinion they are better than race to the edge.
this movie is good, but the first two where better. That dosent mean im not an httyd fan to the core though! I wish the dragons didnt leave, and i dont know why they did. Still this is a movie you must see!