About Dragons Riders of Berk Season 2, Episode 6 :

Hiccup must help Astrid face her fear of the terrifying Flightmare, a ghostly dragon that seemingly “froze” her uncle with fear, shaming her family name. With Fishlegs’ help, they discover that there’s more to the Flightmare than meets the eye. Guest Stars: America Ferrera, Zack Pearlman, Nolan North, Brook Chalmers, Lucas Grabeel, Chris Edgerly,