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A Viking tribe that lives on the mythical island of Berk takes on a dragon that lives there. The chief's son Hicks and his tamed dragon Toothless succeed in allowing the Vikings and the dragon to make peace.
Stoick imposes flight restrictions on the dragon academy.
The Iron Gronckle. When Meatlug eats magnetic rocks, she becomes magnetic herself.
The kids go on a training mission on an island inhabited by wild dragons.
When the town's well runs dry, Hiccup and Toothless investigate.
Snotlout is concerned when his dragon's flame goes out.
Hiccup and Astrid try to stop a mysterious glowing dragon from reaching the village.
The gang organises a competition to see who the best trainer is.
Different species of dragons are found on Dragon Island.
While searching for traps, Tuffnut, Barf and Belch get trapped themselves.
View to a Skrill. Bucket and Mulch accidentally discover a skrill.
View to a Skrill. Tuffnut goes undercover to help the gang rescue a skrill captured by the Berserkers.
With Snotlout's fate unclear, Gustav tries to fill in for him at the Dragon Academy.
The gang attempt to free a trapped scauldron dragon.
Stingers infest Berk during an ice storm and drive the residents into hiding.
The town is getting ready for harvest, but Hookfang and Stormfly can't get on.
A dangerous flu is spreading throughout Berk and Toothless is its latest victim.
A rogue species of dragon terrorises Berk by stealing all of the metal in town.
Bing! Bam! Boom! Three adolescent thunderdrums cause havoc on Berk and only Thornado can control them.
Cast Out Part 1. After disobeying orders, Snotlout is expelled from the academy.
Cast Out, Part 2. Hiccup and the gang must rescue Stoick with assistance from Berk's arch-enemy Alvin.