Grunkle Stan runs for mayor, so Dipper and Mabel try to help their gaffe-prone uncle become the perfect candidate.
Mabel takes matchmaking too far when she steals a love potion from a real love god.
Mabel and Dipper's attempts to celebrate Soos' birthday get interrupted by the time traveling Blendin's quest for revenge.
The kids discover there is a secret society in Gravity Falls.
With Stoick a prisoner of the Berserkers, Hiccup is forced to ask Alvin for help. At the same time, the Screaming Death draws near...
When three adolescent Thunderdrums attack the village, only Stoick's Thornado can bring chaos to order.
The citizens of Berk must face a rogue species of dragon that steals all the metal it can find.
Toothless contracts the flu that is spreading throughout Berk.
With Hokfang and Stormfly fighting, the collection for the harvest is in danger.
When an ice storm hits Berk, Speed Stingers attack the citizens forcing them into hiding.
Tuffnut goes undercover to help the team rescue the Skrill from the Berserkers' grasp.
The death of Cassandra's dad a week before her "Sweet 16" party affects the gang in different ways.
Are guns cool or not? That's what Cassandra and Amber have to decide and what they decide will affect the entire school.
While searching for dragon traps, Tuffnut falls into a trap with a forest fire bearing toward him. Fortunately, an old friend shows up to help.
The gang is given a class assignment to experience life as it was in the early ‘90s by going one weekend without cell phones or computers.
Hiccup and friends discover that several islands have vanished, and that their old foe, the Screaming Death, is responsible.
Amber's unexpected pregnancy teaches the gang about making choices but will they be able to learn how to make the right choice?
High School USA! is about to lose all of its funding unless the gang can find a way to get test scores up.
Astrid sets out to confront the Flightmare, a dragon that shamed her family ten years ago.
When Hookfang's flame goes out, the riders must travel to Fireworm Island to reignite it.
When the village well runs dry, Hiccup and Toothless investigate. They soon discover a group of baby Whispering Deaths beneath Berk.
The team decides to practice, without their dragons, against wild ones and come across Dagur hunting dragons on the island.
After being left behind, Fishlegs and Meatlug overeat and discover that different combinations of stones cause Meatlug to produce different types of materials including glass, steel and magnets.
Certain that Alvin is planning an attack on Berk, Stoick institutes a ban on all dragon flying. Hiccup, certain that Alvin will be using his newfound dragon-training knowledge to bolster his attack, forms a secret “Dragon Flight Club” in order to train the kids to defend Berk against Alvin’s dragon army.moreless
Amber gets upset when she learns that her mom is an amateur porn actor, and Marsh must reunite the two former BFFs.
**Afraid of being fined by the FCC for content violations, this episode was never aired although it was briefly available on HULU.moreless
Cassandra goes through a major identity crisis when she finds out that she's actually adopted... and Chinese.
Marsh (Vincent Kartheiser) meets his hero, The Candy Diet Guru Garrett Philanders (guest voice Anders Holm).
The pressure is on at High School USA when the gang prepares to take the SAT exam, so they resort to pill-popping measures. Meanwhile, Blackstein joins the school's gay club to beef up his extracurricular activities, but he must hide the fact that he is straight in order to stay in the club and get into college.moreless