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DreamWorks Dragons
位于寒冷北欧的博克岛，千百年来，岛上的维京武士都与形态各异的龙族展开永无休止的惨烈战争。随着希卡普（杰伊·巴鲁切尔 Jay Baruchel 配音）和可爱的无牙邂逅，一切开始发生转机，岛民们尝试和那群大家伙和平相处，但是龙族“毫无章法”的生活习性令一部分人再也无法忍受，他们决定撕破停战协议，将龙族赶出博克岛。希卡普不愿看到噩梦重演，他决定和阿斯特丽德（亚美莉卡·费雷拉 America Ferrera 配音）、鱼腿、双胞胎等好友开办一间驯龙学校，好好教育、训练一下这群大家伙。一切似乎开始出现转机，而面对野性十足的龙族，惊险刺激但紧张有趣的故事注定接连上演……
Certain that Alvin is planning an attack on Berk, Stoick institutes flight restrictions on the dragon academy. Hiccup, certain that Alvin will be using his newfound dragon-training knowledge to bolster his attack, forms a secret “Dragon Flight Club” in order to train the kids to defend Berk against Alvin’s dragon army.
When Meatlug accidentally ingests magnetic rocks, she becomes magnetic herself - causing destruction through the town, but ultimately helping the kids win a battle against the Outcasts.
The kids go on a dragon survival-training mission to Dragon Island, where they encounter Dagur, the Berserker Chief, who has become obsessed with hunting the Night Fury.
Hiccup discovers that the town's water shortage has been caused by the Outcasts' plan to hide Whispering Death eggs under Berk, which soon hatch and tunnel under the island, threatening the villagers.
Hookfang is losing his ability to catch on fire, and it's up to Snotlout, Hiccup and the others to find the lair of the Fireworm Queen, which may hold the only possible cure, before it's too late.
Hiccup must help Astrid face her fear of the terrifying Flightmare, a ghostly dragon that seemingly "froze" her uncle with fear, shaming her family name. With Fishlegs' help, they discover that there's more to the Flightmare than meets the eye
A Terrible Terror training competition leads to a heated rivalry between Fishlegs and Snotlout, allowing Alvin to kidnap Meatlug. The kids must use their newly trained Terrors to rescue their friend.
When wild dragons start overwhelming Berk, Hiccup and Toothless discover islands are disappearing throughout the archipelago. When Hiccup and Toothless investigate the cause, they then encounter the Screaming Death.
While searching for traps, Tuffnut, Barf and Belch get trapped themselves... and a forest fire is approaching.
When the dragon riders discover a frozen Skrill, a lightning-powered dragon revered by the Berserkers, they scramble to get it off Berk.
Tuffnut goes undercover to help the riders rescue a Skrill.
Snotlout becomes convinced he is dying, and leaves Hookfang to Gustav. But when he "miraculously" recovers, Snotlout takes his dragon back, and Gustav decides to get a dragon of his own and join the academy... whether they want him or not.
Hiccup and co. discover an injured Scauldron on the shores of Changewing Island. The kids must heal the dragon and return him safely to the ocean, before he falls victim to the elements, as well as the territorial Changewings.
Hiccup and Toothless return from a mission to find Berk mysteriously empty. They discover that the village has been overrun by Speed Stingers, a venomous non-flying dragon that has trekked across the frozen sea to Berk.
Hookfang and Stormfly quarrel while the town prepares for the harvest.
Berk has been plagued with a bad case of the Eel Pox. Hiccup, Toothless and the gang, along with Gothi, go gather the ingredients for the cure. There's just one problem; the final ingredient is an eel from Eel Island.
The mysterious theft of metal objects all over Berk reveals the presence of marauding Smokebreaths. Hiccup and Toothless soon discover that these dragons are the work of Dagur, in a plot to render Berk defenseless.
When three adolescent Thunderdrums attack the village, only Stoick's Thornado can bring chaos to order.
Snotlout is expelled from the academy; Alvin returns to Berk to make amends.
Alvin reveals he trained the Screaming Death to attack Berk and destroy the island's inhabitants and only Snotlout and Hookfang can save Berk before it's too late. Meanwhile Hiccup gets ready for a final fight against Dagur to save Toothless and end the barbarians invasion of Berk once and for all.
