|“||Fishlegs and Meatlug liberate the Gronckles from a menacing new dragon that has encroached on their ancestral home, Dark Deep.||”|
- Dark Deep is Introduced.
- The Catastrophic Quaken is introduced.
Hiccup and Toothless finish constructing a somewhat long-distance telescope at their Island to act as a scouting mechanism. Just then Hiccup wonders how the Twins are doing on constructing the watchtower, whereas Astrid is certain it's going to be a disappointment. However, Tuffnut and Ruffnut actually build a proper watchtower and, for the first time in their lives, they have this feeling of 'accomplishment'. They decide to hurriedly fly back and 'rub it' in Hiccup's face before the feeling is gone. When they arrive, the Twins invite the rest of the dragon riders to their great 'accomplishment', their watchtower, but when they get to the site of the tower, it has mysteriously disappeared without a trace. The Twins try to explain to them that they did build a fine watchtower but most of the Riders are unconvinced.
Meanwhile, Fishlegs is feeding Meatlug different types of rocks that cause her to give different types and colors of flames to experiment with the Dragon Eye, as the glow from the different kinds of lava Meatlug spews reveals and deciphers directions to an island Fishlegs had been searching for: Dark Deep. He finally unlocks them maps pointing to Dark Deep and summons Hiccup excitedly to show his discovery. Hiccup is glad to see Fishlegs has found the maps pointing to the ancestral home of all Gronckles. Snotlout comes in and asks what all the commotion is about and Fishlegs explains to him but in the end, Snotlout gives no care or support whatsoever. Nonetheless, Fishlegs and Meatlug prepare to travel to the island the next day as he wants to be the first Berkian to ever set foot on the island. Hiccup says he wants to tag along which Fishlegs accepts but tells Hiccup to not step on the island first, as he wants to be the first.
The next day, Hiccup and Toothless prepare for their journey but pause, seeing the Twins both heavily exhausted as they try to construct their watchtower again. They invite Hiccup to witness it, but again, the watchtower is gone. The Twins suspect that someone is stealing their 'watch tower' and leave the scene bickering after all their hard work is in vain.
Afterward, Hiccup and Fishlegs begin their journey, Fishlegs' excitement causes him to sing in joy throughout the journey and Hiccup remarks that he has never seen him this happy since they were seven. Once they arrive, Fishlegs still continues to sing in great joy but is oblivious to seeing that the place is empty, Hiccup suggests that they are on the wrong island, but Fishlegs is certain this is the home of Meatlug's species (Gronckles). Meatlug, later on, finds a few Gronckles below ground and Fishlegs attempts to greet them, but the Gronckles are a bit aggressive towards them. Suddenly, the ground shakes and they spot what seems like a huge boulder rolling quickly towards them, they flee and Toothless is unable to slow down the 'boulder'. When the 'boulder' misses them, it suddenly redirects and heads straight for them. Hiccup, Fishlegs, and the dragons run for their lives and are nearly crushed, but luckily find a side tunnel that causes the 'boulder' to miss them. They finally lose sight of the 'boulder' and attempt to escape quietly, but falls apart when Fishlegs' stomach rumbles after his decision to skip 'third breakfast' is making him hungry, causing the 'boulder' to find them.
The 'boulder' turns out to be a new huge and powerful Boulder Class dragon, which uses its tail to batter the rocks causing it to fall down to them, while in a dangerous moment, Fishlegs names it to be the 'Catastrophic Quaken', Hiccup tells him to name it later and focus on an escape. Toothless fends off the Catastrophic Quaken causing it to go on protection by rolling up as a boulder, Hiccup sees it as their chance to escape, and they resurface. Hiccup and Toothless tells Fishlegs and Meatlug to retreat along with the stray Gronckles.
When Hiccup and Fishlegs bring in the stray Gronckles, the Riders complain as a lot of wild Gronckles, all from Dark Deep, have already decided to live on their island after their homeland has been threatened by the Catastrophic Quaken. Hiccup and Fishlegs inform them they can't relocate the Gronckles back to their home as the Catastrophic Quaken has chased them all off, while Snotlout is disappointed at them for not being able to stop one dragon from taking over the island. Hiccup proposes that they gather all the wild Dragons in order, where he assigns the Twins in charge of it after failing to build the watchtower. The Twins struggle against the Gronckles as there are too many of them to take care, Fishlegs and Meatlug watch them as they are upset about Meatlug's homeland taken over by one dragon and promises to take it back someday. Just then Snotlout interrupts offering Fishlegs help by training him to be ruthless, risk-taking, and aggressive. But Fishlegs is reluctant to do it, but Snotlout asks him if he really wants to win over the island, Fishlegs answers 'yes' but does not want to do it in Snotlout's way. Fishlegs leaves but Snotlout shouts telling him that he will certainly return and take the offer.
The next day, Fishlegs visits Hiccup while he is fixing Toothless' tail rod, Fishlegs asks Hiccup if he has any plans at all to reclaim Dark Deep for the Gronckles. Hiccup recommends not to fight the Catastrophic Quaken and leave the island to him, as he observes it to be just what happens in nature where something big eventually takes over an island, and then something else bigger will take place and so on. Fishlegs is disappointed.
At night, Fishlegs gets a wake-up call after having a nightmare where the Catastrophic Quaken chases him and some Gronckles on Dark Deep while 'dream Snotlout' tells him that he would return and take the offer. Terrified by the nightmare, Fishlegs, though hesitant to say it, asks Snotlout how to fight the Catastrophic Quaken. Snotlout is glad to have heard that and begins training but in secrecy, as Fishlegs does not want Hiccup to find out. While training for hours, they try to cover up their training from Hiccup as best they can, as Hiccup begins to become suspicious of their doings lately. Just as Snotlout tells them they are ready to take on the Quaken, Hiccup discovers them and asks Fishlegs the truth, Fishlegs confesses as he reasons to Hiccup that they can't just sit by and watch the Quaken live life by himself on Dark Deep as he knows that the island is the Gronckles' true home. Hiccup still pleads him not to battle the Quaken as he tells him that this is not the 'Fishlegs' he knows and he cannot listen to Snotlout's suggestions as he points out that his actions lead to disaster. Hiccup does accept Fishlegs' pleas to have the Gronckles reclaim their home but not involving fighting the Quaken. Hiccup and Toothless leave in the hopes that Fishlegs' will realize his mistake. Just then, the Twins interrupt, asking them if they have seen any 20 Gronckles pass by them, then realize their mistake of building a wall out of rocks to contain them.
Snotlout requests a ride home from the Twins, but Fishlegs instead offers him a ride but on one condition. Fishlegs decides to face the Catastrophic Quaken with Snotlout despite Hiccup's pleas. Fishlegs feels bad but Snotlout cheers him up saying that he did the right thing, however, when the Quaken emerges, Snotlout had not understood the sheer size of the dragon and asks Fishlegs why he had not described the dragon properly. Snotlout flees in fear followed by Fishlegs, Snotlout and Hookfang leave but Fishlegs and Meatlug stay behind, deciding to fight the Quaken. Hiccup and Toothless and Astrid and Stormfly arrive to help Fishlegs get away from the Quaken. In the ensuing mayhem, Fishlegs and Meatlug are pushed back down below inside the Catastrophic Quaken's cave where Fishlegs sees that he's been living on the island all by himself.
As Fishlegs and Meatlug run for the exit, they are confronted by the Catastrophic Quaken. Fishlegs stands his ground in bravery, while the Riders think that what he's doing is suicide. The Catastrophic Quaken rolls down quickly towards them, and launches itself and seems to plummet and crush Fishlegs to death. However, it is shown that Fishlegs lives, but the Quaken is right in front of them. Meatlug tries to communicate with it and discovers that the Quaken isn't actually aggressive at all, and befriends it along with other Gronckles also.
Hiccup is impressed with Fishlegs after facing the large dragon, which he describes to be the craziest and bravest (but mostly craziest) thing he has ever seen Fishlegs do. Fishlegs tells Hiccup he that he was right about him, that 'fighting dirty' was and is not his character after seeing the Catastrophic Quaken was only being defensive because it was actually scared by itself, and they had mistaken him to be aggressive or angry, but now the Quaken shares the island to the rest of the Gronckles.
Snotlout congratulates Fishlegs after what he did today, claiming it's what he exactly trained him to do. Fishlegs asks him more about his training, but reveals to be only sarcasm and even makes a comeback at him, saying 'Oh, that's right! I just remembered I don't care,' the quote he also said to Fishlegs earlier. The episode ends with Snotlout claiming he 'taught him too well.'.
- At the end of the episode, Snotlout breaks the fourth wall by smiling sheepishly at the audience, after he said he taught Fishlegs too well.
- Apparently, if you translate Snotlout's diagrams, you realize that he's talking about and drawing about how to give people wedgies.
- The name of the episode appears to be a play on the expression "stop, drop, and roll".
- Jay Baruchel as Hiccup Horrendous Haddock III
- America Ferrera as Astrid Hofferson
- Christopher Mintz-Plasse as Fishlegs Ingerman
- T.J. Miller as Tuffnut Thorston
- Andrée Vermeulen as Ruffnut Thorston
- Zack Pearlman as Snotlout Jorgenson
- Barf and Belch
- Tuffnut Junior, Junior Tuffnut, and Junior Tuffnut Junior
- DreamWorks TV Dragons: Race to the Edge Episode Guide. (Copyright 2018). DreamworksTV.
- "Things I just freaking adore about Race to the Edge". (Date Posted - December 10, 2016). Tumblr.