Astrid comes down with the scourge of Odin and the Riders must search for the cure by finding a nearly extinct buffalord dragon before Viggo does.Source: CBBC
Race To The Edge: Episode 25
Hiccup doesn't know who to trust when Viggo and Ryker each tell him that the other has gone rogue, and is sidetracked when a new dragon attacks.
Race To The Edge: 24. Blindsided
A huge storm hits Dragon's Edge, causing the Dragons to spook and run off. But when Astrid is blinded, Hiccup must lead her to Stormfly.
Race To The Edge: 10. Twintuition
When the twins journey to the Northern Markets to fix their prized mace, they end up stumbling onto a secret project by Viggo and the dragon hunters.
Race To The Edge: 9. Out Of The Frying Pan
When the eruptodon can't take its egg into the Great Volcano, Hiccup and Fishlegs must go into the dangerous volcano with the egg before it's too late.
Race To The Edge: 8. Gold Rush
Animated series based on How to Train Your Dragon. Hiccup and the Riders, with help from Dagur, hatch a plan to steal Berk's gold back.
Race To The Edge: 7. The Longest Day
During the week of the midnight sun, when the sun doesn't set for a week, Hiccup must deal with sleep deprivation and a dangerous new dragon.
Race To The Edge: 6. Dire Straits
Viggo gets angry at the dragon riders continually interfering with his business and uses a deep sea dragon, the Submaripper, to control Berk's trade.
Race To The Edge: 5. Saving Shattermaster
Animated series. When Mala and the Defenders of the Wing find a mysterious stranger who looks suspiciously like Dagur, Hiccup and Heather go to investigate.
Race To The Edge: 4. Not Lout
When Snotlout messes up a mission, he must learn to be a leader and earn the trust of the other riders.
Race To The Edge: 3. Midnight Scrum
When Viggo puts a bounty on Hiccup's head, every dragon hunter in the world goes after Hiccup, so Toothless and the Riders must rescue him.
Race To The Edge: 1. Defenders Of The Wing Part 2
Hiccup, Mala, Astrid, Fishlegs and Snotlout go searching for the now captured Eruptodon, but little do they know that Viggo has a sinister plan.
Race To The Edge: 10. Stryke Out
Hiccup and Toothless are captured, so they must find a way to escape the Dragon Fighting Arena and survive an attack from the fearsome triple stryke dragon.