The Riders flee to Berk, where Stoick's plan for defeating the Flyers, which will require a painful sacrifice, spurs Hiccup to seek an alternative.
After Stormfly tangles with two poisonous Slitherwings while defending Garff, Astrid must risk her own life to get an ingredient to make an antidote.
When Ruffnut refuses to become Throk's bride because it would mean leaving her twin, Tuffnut fakes his own death to give her the freedom to marry.
When Heather goes to meet a man claiming to have seen Oswald, she walks into a trap that forces the Dragon Riders to pay a dear and unexpected price.
A sketch in an old diary leads Hiccup and Fishlegs back to Vanaheim, where they help Dagur search for his long-missing father, Oswald the Agreeable.
Venezuelan president Nicolas Maduro makes moves toward turning the country from a democracy into a dictatorship, creating a growing opposition to his rule.
Jestro and the Cloud of Monstrox builds a new stone army from giant building blocks to crush Knighton. The Nexo Knights try to convince Rockowski, a demolition expert, to help them.
In 1997, a son must teach his mother how to use the Internet over the phone after leaving behind an important document on his laptop.
Bob mistakes a mud-covered pig for Rolly and accidentally leaves him behind on a farm.
Elena and her friends get stranded on a sailboat and are rescued by a mysterious ship.
While Ruth and Travis experience the worst day of their lives, Dank and Dabby come to a short-lived realization.
Travis impresses Ruth with his business savvy, Olivia introduces a new delicacy to the dispensary, and Pete gets an otherworldly visitor.
While attending a funeral for a famed pot activist, Ruth imagines what Travis might say at her memorial when the time comes.
The employees at Ruth's Alternative Caring marijuana dispensary are passionate about life, love and pot. But mostly pot.
Carter seeks advice from Ruth, and Jenny comes clean with Pete. Travis brings his new girlfriend to the dispensary, much to Olivia's annoyance.
Travis and Olivia come to an understanding, Dank and Dabby land an unexpected endorsement, and Carter opens up about his past.