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.
When Master Frown steals Puppycorn's birthday wish, Unikitty and Puppycorn have to venture into Frown Town to get it back.
The Guy tries to de-stress when he ends up in an uncomfortable situation. A freelance brand strategist struggling with her latest assignment embarks on a desperate search for a weed fix.
Martha shows viewers how to prepare maple cream sandwich cookies; chocolate chip cookies; oatmeal raisin cookies.
Vee and her family get scared during the town's anniversary celebrations.
Plankton tells his grandma that he owns the Krusty Krab, but must keep the lie going when she comes to visit.
A dog-loving couple dream of a tree house that recaptures mountain vistas; Pete and his team build a bulldog bungalow that offers a bounty of outdoor decks and loads of large windows to take in a view once lost
SpongeBob and Patrick exchange tiny living versions of themselves.
Troy puts his sharpshooting to the ultimate test. Frenchy ventures into uncharted territory. Jay Paul and RJ pursue their old nemesis, Houdini. Kristi hunts to pay for a new hay barn.
There’s only one thing left for Conor and Jock to do to get Linda and Siobhán to really fall for them – spend a whole day together on a beautiful adventure.