Hiccup and Astrid race to stop the Dragon Hunters from tracking the Flightmare after Heather spills secrets from Viggo Grimborn.
After Heather and the Flightmare have been captured by Viggo and the Dragon Hunters, Hiccup must hatch a plan to outwit the dangerous new enemy.
The Skrill returns with a vendetta against Hiccup and Toothless. Hiccup and the Riders must choose a new course of action to stop the vicious dragon.
After a strange creature bites Tuffnut, he believes he'll turn into a legendary Lycanwing dragon when the moon is full. Can his friends save him?
When Ruffnut is captured by Dragon Hunters, it's up to Astrid and Tuffnut to defend Dragon's Edge from the invading Dragon Hunter army.
As Hiccup and Snotlout race to rescue the others from the Dragon Hunters, they don't realize that someone close to them is working with the enemy.
When a new tidal class dragon, the Sea Shocker, is found in Edge Cove, the riders must help it escape a group of hungry Scauldrons and reunite it with its migrating pod.
Unaware of the war on Dragon's Edge, Hiccup, Snotlout and Johann discover an island full of dragons that have been wounded by the Dragon Hunters.
Ryker is determined to create a key to the Dragon Eye, so he heads to Glacier Island to find the Snow Wraith that the Dragon Riders are protecting.
After Hiccup and Toothless heroically save Barf and Belch, the grateful Zippleback tries to repay its life debt by abandoning riders Ruff and Tuff.
Snotlout and Astrid must deliver a special battle axe to a family wedding, but when an Armorwing dragon derails their plan they have to work together.
A new enemy named Ryker Grimborn captures Stormfly, sending Hiccup, Toothless and the team off to rescue her before it's too late.
After an attack on Berk, Astrid trains a crew of backup Dragon Riders to battle back—but no one can guess how soon the next strike will hit.
Five former couples travel to a remote island to break free of their toxic relationships forever. The first night, jealousy pushes one of the exes to snap. In therapy, their darkest secrets are revealed.
Liz awaits trial as Red and Aram take risky measures to protect her.
Christy hosts a dinner attended by Violet's future mother-in-law, who is hard to please. Steve wants to take his relationship with Bonnie to the next level.
Heather and Tim finally find another couple they actually like to socialize with, but Sophia and their son don’t hit it off. Also, Greg insists he and Jen take separate flights in case something happens to the plane, Matt and John take Gary out to meet women, and Matt’s ex-wife, Bonnie, surprises him with a visit
Harlee Santos, a detective from a tight-knit group of Brooklyn cops with questionable tactics, is arrested by an FBI agent who wants to make her an informant. Co-stars Ray Liotta.