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.
Host Holly Baker visits top destinations across the country and helps prospective homeowners choose potential vacation homes to buy and how to optimize their rental potential as future rentals on sites like VRBO and HomeAway.
While stuck in a restaurant bathroom, Ray, Henry, Charlotte, Jasper and Schwoz reminisce about past adventures.
Captain Man and Kid Danger use Schowz' Fish-Talker helmet to help a lost fish find its way home.
Ichigo, Goro, and the rest of Squad 13 engage in a battle far more dangerous than any they've fought before, all while having their mind preyed on by the fact that this will be Hiro's third ride with Zero Two.
Sandi Toksvig ventures Overseas to find out about who keeps their brothers in a cage, and much more. With Bill Bailey, Colin Lane, Desiree Burch and Alan Davies.
Rodrigo distracts himself from the Requiem as he dives deeper into coaching Hailey for her big gig. Gloria gets a visit from a famous composer, eager to premiere his latest piece with the NY Symphony, but Thomas thinks his knows of a better fit. Despite doctor's orders, Cynthia returns to playing with renewed vigor.
On a mission to talk to Mozart, Rodrigo visits an unusual classical music collector (Michael Emerson) who might have what he needs. Hailey gets an exciting conducting opportunity, but has to prove she is up for the challenge. Thomas discovers the missing ingredient for the Queens Phil and invites Cynthia along for the ride.
Hailey faces off against new peers at the Fukusoft Conducting Competition in Japan. Rodrigo meets a new composer who claims to know more about Mozart than he does. Gloria tries to eclipse Betty in her fight for Fukumoto's attention, and Thomas is reluctantly reunited with an old flame.
Andi is left confused when Jonah stops wearing the bracelet and tells her he doesn’t like labels. At her basketball game, Buffy finally gets what she has been hoping for.
As Rodrigo and Hailey navigate the status of their new relationship. She gives her Ensemble a fresh direction. Thomas steals Gloria away from work for some afternoon romance. And a world-renowned choreographer (John Cameron Mitchell) invites Rodrigo to collaborate on a new ballet.