Hiccup and Toothless embark on a challenging adventure to the island, but what may lie in his path, only one can guess. By working together, Stoick and Hiccup are able to free the Riders and their dragons and repel Krogan's invasion. The Riders and wild dragons defeat the hunters while the Bewilderbeast escapes. Mala is finally convinced that the riders are allies of the dragons and the two groups align to defeat the hunters for good. When the riders go on a mission to destroy the hunters' increased supply of Dragon Root, Snotlout at first refuses to go, but returns to save the riders when he discovers the trap that has been set.
They question why Johann would simply abandon the King of Dragons, but discover that the flame of the Dramillion dragon shows a different picture through the Dragon Eye and reveals the true King of Dragons, a Bewilderbeast, in the Berserker Island. She joins the riders in searching for the dragons who were scared off by the storm, but her stubborn and fiery attitude makes things tough when they run into the aggressive and still untrained Triple Stryke. With no metal, and therefore no weapons to protect their village, Hiccup and the others must find a way to get rid of the rogue dragons, only to discover that the Smokebreaths' appearance was planned as an attack by Dagur the Deranged. De Marco January 8, 2016 2016-01-08 Spitelout comes to Dragon's Edge to announce a union between the Jorgenson and Hofferson clans and charges last pick Snotlout with delivering the Jorgenson family axe to the Isle of Frigga for the ceremony. The riders take it back and nurse its leg to health when Fishlegs discovers the Stinger has gained webbed feet as a result of evolution.
The teens must drive the Screaming Death and the Whispering Death hatchlings away from the village before they destroy Berk. Though Astrid is poisoned herself to gather the venom needed for the antidote, it proves ineffective on Stormfly, which turns out to be due to her never being poisoned and instead is grieving over the loss of Garff. Sullivan John Tellegen February 17, 2017 2017-02-17 The riders attend Berk's 400 year anniversary, but there is little chance for celebration when they learn Viggo has placed a bounty on Hiccup's head. However, he states that they must compete against each other, as only one can prevail. Hiccup, Astrid and Snotlout pursue the Flyers, but are forced to retreat into a ship and devise a plan. Unfortunately it is found she was working with the Outcasts and, despite the Dragon Riders' effort, she manages to give the ancient Book of Dragons to Alvin.
Dagur offers her the chance to join with the Berserkers, but she refuses. 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. After arriving, they find the Sentinels seemingly dead and interrogate a remaining Flyer, who reveals the rest of the Flyers are on their way to inform Johann of Vanaheim's location. With the aid of Stoick and the Rumblehorn, the riders create a wall to block the wave and protect the island. In the cave, Hiccups finds Garff while Fishlegs brings the Cavern Crasher to help dig a new exit and move the Singetail eggs to safety. The riders return to the island and reclaim the hidden gold, and Heather finally decides to go with Dagur to find her father.
Back at the Edge, Heather finds a note from Dagur telling the truth about their father, leaving Heather to mourn in silence. After six incredible seasons, Race to the Edge is finally over! 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. After making a plan, they release the captive Singetails only to find the dragons turning on them and forcing the riders to fall back in a cave with no escape. Johann convinces Heather to go through with the trade and though Krogan attempts to double cross her with a fake key, they are saved by Hiccup, the Riders, and Dagur, who finally reveals the truth of Oswald's fate and grants her closure. The series begins where the first movie leaves off, featuring 15—16 year old characters.
When Hiccup attempts to take out Heather, Astrid intervenes and tells him and the others about Heather's plan to learn about the hunters' real leader, Viggo Grimborn, whom everyone is afraid of. Hiccup and Fishlegs develop a mixture of Deathsong amber and Gronkle Iron to stop the lava bursts, but while gathering materials, Hiccup and Astrid discover an older Garff mortally wounded, hinting that the Hunters, who are now led by the masked man who tried to abduct Hiccup and has the ability to control dragons, are continuing activity. Hiccup enlists the aid of his father in tracking down the Rumblehorn, but Stoick comes to question its intentions upon discovering it. Though they receive reprimand, Astrid promotes them to full Riders with Gustav as the leader and remains on Dragon's Edge. At the same time, Gobber appears and warns Hiccup of an unpleasant change in Stoick back on Berk that is currently driving everyone crazy. The riders, Heather in particular, refuse to listen and head in anyway, leaving Dagur to take charge and sacrifice himself to allow the riders to escape. They come across an island that they think is perfect only to wake in the morning to find that their dragons have been trapped by an amber spitting dragon they call the Death Song.
It's dangerous behavior forces the other Gronckles to leave and seek refuge on Dragons' Edge, much to everyone's dismay. Stoick decides to leave, but Hiccup helps him see things from the Jorgensons' point of view and convinces him to return, but when more Singetails arrive, Spitelout decides to abandon the island, stating they will build another storehouse elsewhere. After deciding that the Armowing will make the best use of their spare scrap metal, Hiccup, Astrid wearing Hiccup's Betrothal necklace , Snotlout, Fishlegs and Dagur go to the island to find the dragon. The riders learn from Mala, who joins them, that Viggo plans to use the starving Eruptodon to destroy Dragon's Edge by eating at its dormant volcano. This causes Toothless to come down with the dragons' version of Eel Pox, skittish and uncontrollable fire power. Though still doubtful, Hiccup and the others scramble to keep the siblings from noticing each other by sending Heather away while offering Dagur a Gronckle he names Shattermaster to get him to leave, but they cross paths anyway.
The riders and Gothi travel to Glacier Island to retrieve the tooth. Stoick momentarily wakes up to help him make the right choice. Using the baby Razorwhips, the Wingmaidens defeat Flyers. Hiccup, Snotlout and Johann try to devise a plan when Fishlegs ends up held hostage by them. Before leaving, Alvin arrives with reinforcements to help keep Berk safe while Stoick is recovering.
But here's something we do know:! Meanwhile, Stoick and Gobber, left in charge while the riders are away, lose Tuffnut's pet chicken and each try to replace it with a new one. After hearing this, Astrid starts to think that Hiccup isn't interested in her anymore since they are not as publicly affectionate as Dagur and Mala and begins to question her relationship with him. Hiccup and Fishlegs face continuous difficulties working together to deliver the egg, and things are made worse when a pack of wild Fire Terrors inhabiting the cave kidnap the egg. In the end, the twins, who have been pranking everyone without end, receive retribution by the rest of the riders. They launch their attack and rescue the others, and both sides prepare for their next encounter. They deliver the axe late only to discover a fight broke out and the wedding was cancelled.
Snotlout uses the Smothering Smokebreaths to get it back and the riders help the Armorwing when they pick apart its hide, earning its trust. Stoick threatens Ryker to tell Viggo to call off the bounty and the masked man, seeing no chance to take Hiccup to Viggo himself, escapes. Meanwhile Fishlegs teaches the twins about Viking marriage and Tuffnut, believed to be certified, weds Fishlegs and Ruffnut. They find he has already established the storehouse on another island and has been defending it from an attacking Singetail. Meanwhile the twins, Snotlout, and Astrid search for Chicken, who has gone missing, and find she has started a new family with a wild rooster. A one-hour preview consisting of two episodes aired on August 7, 2012, with the official premiere of the series on September 4, 2012.