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Dagur the Deranged visits Berk to renew a peace treaty between the Berserkers and Berk, and the dragons are put into hiding to dispel rumours that Berk is training a dragon army. But when Ruffnut and Tuffnut begin to fight, their dragon, Barf and Belch, is left out of control. The Viking youths must bring the twins back together to control their dragon and avoid provoking Dagur to war.
Episodes
1How to Start a Dragon Academy 2Viking for Hire 3Animal House 4The Terrible Twos 5In Dragons We Trust 6Alvin and the Outcasts 7How to Pick Your Dragon 8Portrait of Hiccup as a Buff Man 9Dragon Flower 10Heather Report (1) 11Heather Report (2) 12Thawfest 13When Lightning Strikes 14What Flies Beneath 15Twinsanity 16Defiant One 17Breakneck Bog 18Gem of a Different Color 19We Are Family (1) 20We Are Family (2)