
While hunting for gemstones needed to complete the Dragon Eye 2, Hiccup learns an old friend isn’t who he seems. Dagur faces a bully from his past.
When Heather goes to meet a man claiming to have seen Oswald, she walks into a trap that forces the Dragon Riders to pay a dear and unexpected price.
A sketch in an old diary leads Hiccup and Fishlegs back to Vanaheim, where they help Dagur search for his long-missing father, Oswald the Agreeable.
When Ruffnut refuses to become Throk’s bride because it would mean leaving her twin, Tuffnut fakes his own death to give her the freedom to marry.
After Stormfly tangles with two poisonous Slitherwings while defending Garff, Astrid must risk her own life to get an ingredient to make an antidote.
An unlikely ally helps Hiccup uncover Singetail behaviors that can be exploited to conquer the Flyers. An overconfident Krogan makes a strategy error.
The Riders flee to Berk, where Stoick’s plan for defeating the Flyers, which will require a painful sacrifice, spurs Hiccup to seek an alternative.
After the Edge is ambushed by a group of Singetails, the Riders quickly take flight to ward them off, but are shocked when they get a closer look.
The Outcast leader, Alvin, is kidnapped and held for ransom by bandits. They call on the Dragon Riders to request the assistance of Thor Bonecrusher.
Disobeying Hiccup, the twins follow a retiring Eruptodon to its final resting place, Vanaheim, and learn why no human has ever gone there before.
When Snotlout is rescued from a storm by a tribe of winged women, he thinks he’s gone to Valhalla — until he learns he’s going to be their dinner.
The Riders accept an invite to Berserker Island, where their reunion with Heather, Dagur and a young familiar face is interrupted by a sudden revolt.
As the Riders investigate why traders are disappearing from the Northern Markets, Hiccup and Snotlout fall victim to a treasure-hoarding dragon.
While trying to stabilize the volcano that threatens to destroy Dragon’s Edge, the Riders discover troubling evidence of new Hunter activity.
The Riders learn of Ryker’s attack on the Edge and attempt to stop the Shellfire and keep the Dragon Eye from being reclaimed by the Hunters.
After months of planning, Hiccup launches an operation to capture the Dragon Eye from Viggo, only to find that someone else has beaten them to it.
While rescuing the dragons from a fire in the stables caused by a powerful lightning storm, Astrid suffers an injury that leaves her blind.
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.
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.
Hiccup and the Riders, with help from Dagur hatch a plan to steal Berk’s gold back.
During the week of the Midnight Sun where the sun doesn’t set for a week, Hiccup must deal with sleep deprivation and a dangerous new dragon.
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.
Hiccup and Heather are shocked to see Dagur among the Dragon Hunters. Snotlout undergoes the Trials, a series of tests he must pass to be Mala’s king.
After getting bad advice from his father, Snotlout tries to seize leadership of the Dragon Riders and starts making reckless decisions on his own.