"How To Train Your Dragon: The Series" is an animated television show based on the popular film franchise. It follows the adventures of a young Viking named Hiccup and his dragon, Toothless, as they explore the world of Berk and learn about friendship, bravery, and understanding between humans and dragons. The series expands on the themes and characters from the movies, introducing new dragons and challenges. It showcases the growth of Hiccup as a leader and his efforts to unite the Viking community with the dragons, emphasizing the importance of cooperation and empathy in overcoming obstacles.