The Riders race to the home of the true King of Dragons. But the Flyers are already there, and they soon come face to face with the legendary creature.

Cast: Jay Baruchel, America Ferrera, Zack Pearlman, Christopher Mintz-Plasse, Andree Vermeulen, T.J. Miller, David Faustino, Michael Goldstrom, David Tennant, Mae Whitman, Hakeem Kae-Kazim, Holly Kagis