When a dragon that causes man-eating whirlpools threatens Berk's trade ships, the Dragon Riders must remove it without getting caught in its vortex.
Guest Cast

Steve Alterman
voices Additional Voices
Mae Whitman
voices Heather
Mitch Carter
voices Additional Voices
Nolan North
voices Stoick Haddock
Alfred Molina
voices Viggo Grimborn
Michael Goldstrom
voices Trader Johann
Neil Dickson
voices Additional VoicesCast Appearances

Jay Baruchel
voices Hiccup Haddock
America Ferrera
voices Astrid Hofferson
T.J. Miller
voices Tuffnut Thorston
Zack Pearlman
voices Snotlout Jorgenson
Andrée Vermeulen
voices Ruffnut ThorstonEpisode Discussion
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