The Dragons are blamed for vandalism, and Hiccup tries to prove their innocence by forming a night patrol called the "Dragon United Monitoring Brigade" (DUMB), but not in time to prevent the dragons' banishment from the island. Hiccup begins to suspect that Mildew is responsible for the scapegoat.
Elenco: Jay Baruchel , America Ferrera , Christopher Mintz-Plasse , T.J. Miller , Zack Pearlman .