Berk receives its annual visit from the Berserker Tribe to renew a peace treaty. While they expect the friendly Oswald the Agreeable, his son Dagur the Deranged arrives instead, having overthrown his father. Dagur is fanatical about hunting dragons, forcing Hiccup and the riders to hide all dragons to prevent a war. Key Highlights
Ruffnut and Tuffnut experience a rare rift in their sibling bond, leading them to refuse to work together. Because they share a Hideous Zippleback (Barf and Belch), their lack of cooperation causes the dragon to spiral out of control, endangering the village. TwinsanityDreamWorks Dragons : Season 1 Episode 15
To communicate with their dragons silently and avoid detection by the Berserkers, Fishlegs introduces hand signal commands , a mechanic that becomes a staple for the riders in future episodes. Berk receives its annual visit from the Berserker