The twins disobey Hiccup's orders and follow the Eruptodon to Vanaheim to complete their Viking travel guide, leaving all the Riders stranded on the island and unable to leave thanks to the Sentinel dragons guarding it, which have developed a counter-defense for every dragon. One by one the riders are picked off by the rogue until Hiccup and Toothless chase her down and she reveals herself to be Heather, with her new dragon Windshear. In the commander's quarters of 'The Reaper', Hiccup finds a very mysterious device and after a struggle with Dagur all of the group, apart from Hiccup, are trapped in a cage. Seemingly accepting that Ruffnut's place is with the Riders, Wingnut accepts Atali as its new Wingmaiden and caretaker. Sullivan John Tellegen February 17, 2017 2017-02-17 Dagur returns to the Edge claiming to know the location of Viggo's gold stores, and joins the riders on a mission to take back Berk's gold. They worship and protect the Eruptodon at all cost, as it feeds on the volcano's lava and prevents their village from being destroyed.
The fourth season was released on February 17, 2017. After being with the Dragon Riders for a while, she decides to leave for Berserker Island with her brother, Dagur. So with the help of Fishlegs, Hiccup, and their dragons they discover that the dragon uses a paralyzing mist to attack and plan to drive the Flightmare away. Meanwhile, Snotlout, as a result of his saving Mala's life from the Hunters, undergoes The Trials, a series of tests to prove himself as King of the Defenders of the Wing. The second part, titled Dragons: Defenders of Berk: Part 2, was later released on May 27, 2014. Worried, the Riders quickly check on Garffiljorg while the others take the injured Singetail back to the Edge for recovery. When the riders find out they make it clear to him that he is too immature to become a rider, Gustav runs from the island in the night.
As a result, Barf and Belch become indebted to Hiccup and relentlessly follow him around and dote on him, prompting the twins to come up with ways to put Hiccup in danger so their Zippleback will save him and return to them. To try and find an alternate method to victory, Hiccup and Toothless travel alone to Storehouse Island to study the Singetail and find behaviors that will give them an advantage in battle, but this attempt quickly leaves Hiccup at its mercy. When he arrives, he realizes that Viggo is the one who sent the message and Viggo tells the story of his betrayal and asks for Hiccup's help. However, in the finale of Season 5, it is revealed that he has been undercover and is secretly working with Krogan to find and control a Bewilderbeast. The only solution is to bring Astrid to the Buffalord, but Viggo also arrives revealing he infected his own men to get the riders to lead him to the Buffalord. According to , executive producer for , the series was planned to be much darker and deeper than 's previous television series spin-offs, with a similar tone to the movie, and would follow after the events of the first movie.
With the aid of Stoick and the Rumblehorn, the riders create a wall to block the wave and protect the island. The Speed Stingers have trekked across the frozen sea to Berk and driven everyone out of town. As a , she communicates by gesturing or drawing lines and hieroglyphic-like pictures, translated by Gobber or Fishlegs. She trains the dragon and the gang are able to help it. Now, Hiccup must find a way to drive the Speed Stinger horde away from Berk before their next raid.
Mala later falls in love with and marries Dagur the Deranged. After arriving, he immediately finds one and tries to train but discovers it is very aggressive and has the unusual ability to mimic the fire blasts of other dragons, such as a Gronkle's lava blast and Nadder's magnesium fire breath. They care for baby Razorwhips who become their wings until they are old enough to fend for themselves because the adult males of the species would devour the infants and could drive the species to extinction. Back on Berk, Hiccup asks Gobber and Gothi about the device which he dubs 'The Dragon Eye' Gothi tells them that the key to unlocking the 'Dragon Eye' is a tooth from the Snow Wraith A Strike class Dragon that detects body heat as a form of sight. Valuable lessons are learned among the dragon riders all while they work together to finally unearth the true leader of the Dragon Flyers, discover an unlikely ally, and struggle to fight when the fate of all dragon-kind is put at risk.
Out of increasing paranoia, Snotlout begins to make reckless decisions that put the other riders in danger and at odds with him when he attempts to develop himself as a worthy leader only to crack under the pressure. She has a strong bond with her dragon, Stormfly. They live on a volcanic island home to an enormous dragon called the Eruptodon. They realize that they are being sent on a wild goose chase and their absence leaves Berk vulnerable to an attack by Krogan, who proceeds to take over Berk with his Flyers. The two escape into the ship graveyard and Hiccup decides to lure it towards Ryker, Dagur, and the hunters to incapacitate it, but his plan backfires and the hunters capture the Skrill. De Marco January 22, 2014 2014-01-22 1. On another island, an unlikely romance blooms.
Through Ruffnut and Tuffnut's mediation, Dagur and Mala actually get along and develop a mutual attraction for one another. With Spitelout's help, Hiccup discovers weaknesses in the Singetails' behaviours while the Riders, Stoick, the A-Team, and the Berk fleets launch a preemptive strike on Dragons' Edge where the Hunters are. Jones Jack Thomas June 24, 2016 2016-06-24 As the riders continuously sabotage the hunters' business, Viggo offers Hiccup a truce, dividing the archipelago in half to prevent further war between them. Gruffnut is revealed to owe money to the Hunters and promised one of the riders' dragons to pay off his debt. He manages to pass two life-threatening trials but fails in the third, though Mala commends his effort and makes him a guest of honor in a celebratory feast.
The series serves as a bridge between the first film and its 2014 sequel. It becomes apparent that Fishlegs has become allergic to something. Just as they are about to celebrate his graduation, Savage and a faction of Berserkers start a revolt and imprison Dagur and the dragons. Hiccup reconciles with Fishlegs and assures him that he would not ever hesitate to leave him in charge in the future. Using Mala's advice to look at things differently, Hiccup learns to use the Sentinel's behavior and abilities to his advantage and with help from the Eruptodon, manage to escape, and Hiccup destroys Tuffnut's guide to ensure that no other human will discover Vanaheim.