The Riders race to the home of the true King of Dragons. But the Flyers are already there, and they soon come face to face with the legendary creature.
Tropes:
- Back for the Finale: Garff leads a large swarm of wild dragons in freeing the captive Singetails, under the orders of the Berserker Bewilderbeast. Also in attendance are the allies the Riders have encountered - the Wingmaidens, the Berserkers and the Defenders all help protect the Bewilderbeast from Johann's army. Eruptodon, Screaming Death and what looks like Thornado and Bim, Bang and Boom also show up.
- Blade Brake: When the Bewilderbeast's egg falls off the cliff, Hiccup jumps after it and uses Inferno Mk 2 to hang onto the cliff. The blade is dug into the cliff, so he's forced to snap it off in order to climb back up.
- Call-Forward: Drago's scene (indicating that he does not yet possess a Bewilderbeast, which is what he was paying Johann to find), the Wingmaidens knowing Valka is the safest person to leave such a rare dragon egg (and not spoiling the reveal if you were watching the series before the second film), and the reason the team leaves the Edge is that Berk needs their protection. Hiccup also never actually sees the Bewilderbeast, to comply with his not recognizing one in the second film.
- Hiccup even expects in the closing narration that his father will try to hand the reins of chief to Hiccup "very soon" foreshadowing his death, not to mention the opening subplot of the second film where Stoick tries to corner his son to speak to him on that exact topic.
- Continuity Cameo:
- Valka, Hiccup's mother, has a non-speaking one at the end of the episode in her masked form seen at the beginning of the second movie, picking up the Bewilderbeast egg that Hiccup and Toothless rescued, which the Wingmaidens leave for her.
- Drago Bludvist, the Big Bad of the second movie, is also shown at the end as Krogan is brought to him. When he learns that Krogan failed to capture the King of Dragons for him, his master orders for him to be executed.
- Gondor Calls for Aid: The roar of the Bewilderbeast calls in most of the dragons seen through the entire series for the final battle.
- Grand Finale: To the TV series.
- Greater-Scope Villain: Having been hinted at throughout the entire series, this episode finally reveals that Krogan was working for Drago Bludvist.
- Hollywood Kiss: Hiccup and Astrid's first kiss of this episode qualifies as this.
- Kill It with Ice: The Bewilderbeast to Johann, as Johann's final fate is being frozen solid, while trying to kill Hiccup, by the King of Dragons's ice breath.
- My Sister Is Off-Limits: Tuffnut doesn't approve of Snotlout flirting with Ruffnut.
- No-Holds-Barred Beatdown: Johann gives Hiccup a brief one before pulling out one of his throwing knives to finish him, but this pause allows Hiccup to get the upper hand.
- No Man Should Have This Power: The Dragon Eye is just too dangerous in the wrong hands to be worth keeping around, so Hiccup decides to destroy it and the Dragon Eye 2.
- Psychic Powers: The Berserkers' Bewilderbeast and its Mind Control.
- Rapid-Fire "No!": When Krogan manages to use the bolas Hiccup shot at him to knock the Bewilderbeast's egg off the cliff, the latter lets one out chasing after it.
- Role Reprise: Djimon Hounsou returns as Drago when the latter appears in the ending.
- Villain: Exit, Stage Left: After Hiccup retrieves the egg and the others fight off the Hunters, they all realize that Krogan got away. Krogan is then shown being brought to Drago.
- Wedding Bells... for Someone Else: In the "Where Are They Now?" Epilogue, the riders are all attending Dagur and Mala's wedding, the framing and Hiccup's voice over implying to be his and Astrid's wedding before panning out and proving otherwise. Though by the end of the third film, Hiccup and Astrid do get their wedding.Hiccup Horrendous Haddock III: As for the lovebirds... [Shows Hiccup and Astrid kissing with a pair of wedding rings, only to reveal Dagur and Mala putting on the rings instead] No, those lovebirds.
- Wrecked Weapon: Many of the weapons introduced in the series are destroyed in the battle of Berserker Island, explaining their absence or replacements in the second film. Most notably, Astrid sacrifices her original axe to deflect a fireball, and the blade on Inferno Mk 2 is broken when Hiccup uses it to stop his fall in the Bewilderbeast's nest.
- You Have Failed Me: Drago makes an appearance in the epilogue, and promptly has Krogan executed for not being able to bring back the Bewilderbeast's egg.
- Zerg Rush: What happens in the end to the Dragon Hunters.
