Phoebe's first assignment as a superhero is to protect Hiddenville; Phoebe challenges Max to inject some mischief into their sleepy hometown.
The kids go to the mall with their parents and ask to walk around on their own, but trouble follows them.
Dylan has another bad day, Charlie tirelessly tries to help Louis through his withdrawal, and Cal convinces a mum to come clean to her daughter.
Apple Dumplin' comes to visit her cousin Strawberry. Soon she causes trouble: she installs a light/music display in Strawberry's bedroom, but cannot turn it off; later she causes a power failure. After Apple leaves, it is revealed that she fixed the power.
After breaking into the Tartaros stronghold, Natsu goes up against the foul Franmalth before getting an even chillier reception from another member! Meanwhile, the members of Oracion Seis are fighting for their freedom against Jellal, who tells them they're still slaves to darkness!
Nagate rescues Tsumugi but is overpowered by the Crimson Hawk Moth. The situation looks grim as swarms of gauna bear down on the survivors.
Hiccup, Toothless and the dragon riders rescue a wounded Speed Stinger and take it back to Dragon's Edge, unaware of the dangers that follow.
A familiar face joins ranks with the dragon riders, but it's not an easy alliance, especially when Hiccup uncovers a shocking secret about the new member's true identity.
When Hookfang is drawn to a female Monstrous Nightmare, Snotlout tries to break them up before he loses his best friend forever.
The dragon riders are surprised to discover who is behind recent attacks on nearby ships – and to learn exactly what the ships are.
On an island that will make the perfect outpost, the dragon riders discover its indigenous residents are a mysterious new breed of dragon.
When Dagur the Deranged captures young Gustav, it's up to Hiccup, Toothless and the dragon riders to get him back.
Thinking he's allergic to his best friend Meatlug, Fishlegs gets hypnotized – and wakes up transformed into an invincible warrior known as Thor Bonecrusher.
Fishlegs and Meatlug liberate the Gronckles from a menacing new dragon that has encroached on their ancestral home, Dark Deep.
As a Rumblehorn dragon wreaks havoc on Dragon's Edge, Hiccup seeks the help of Stoick – who forms an unexpected bond with the rampaging beast.
Fireworm dragons invade Dragon's Edge, while Ruffnut and Tuffnut discover that they have an unexpected connection to the island.
During their search for the escaped Dagur the Deranged, Hiccup and the Dragon Riders discover a mysterious object—one that holds their destiny.
The dragon riders discover a lush island that turns out to be the home of the Deathsong, a massive, never-before-seen dragon that threatens to trap them forever.