With the fifth lens in place, the Dragon Eye 2 unveils the apparent King of Dragons, and Fishlegs immediately knows what it is and where to find it.
An announcement leads Astrid to question her relationship with Hiccup. The Riders discover an Armorwing that has a Dragon Eye lens welded to its body.
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.
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.
While visiting Wingmaiden Island, a baby Razorwhip bonds with Ruffnut, who suddenly finds herself trying her hand at being a Wingmaiden.
Hiccup grows wary when Gruffnut arrives on the twins' 19th birthday to administer a Thorston coming-of-age ritual involving three dangerous challenges.
Upset after learning his ancestors were Hunters who killed off Dramillions, Fishlegs sets out to see if he can find any of the dragon species left.
Stoick and Hiccup are led on a wild goose chase in search of willow bark for medicine, leaving Berk vulnerable to an enemy attack.
During a trip to Wingmaiden Island to find a Dragon Eye lens, Snotlout challenges Hiccup's leadership. On another island, an unlikely romance blooms.
Guests: Anna Deavere Smith, Fran Lebowitz, Salman Rushdie & Vicente Fox
The further adventures of Hiccup and his friends on the Island of Berk.
The further adventures of Hiccup and his friends on the Island of Berk.
The further adventures of Hiccup and his friends on the Island of Berk.
The further adventures of Hiccup and his friends on the Island of Berk.
Luke plans his next move with Kate, who's having a rough day at school, and discovers VHS tapes that bring back emotional memories.
As a new year begins at Boring High School, Oregon, freshman Luke impresses his friends by inviting sophomore Kate, the principal's daughter, to his house.
A pulled fire alarm lands Luke in detention and his mother in Principal Ken's office. The irate drama club plots revenge on the AV kids.
Luke presents a proposal to the drama club in an effort to make peace. Sherry and Ken engage in some impromptu immature behavior.