Dag discovers that annoying your brother isn't much fun when Norb "bops him into last week" and Dag is forced to retrace his steps over and over again with painful results.
The boys learn the hard way that being on TV isn't all it's cracked up to be when they let a famous nature filmmaker film them and he broadcasts a "funniest videos" style film instead of the serious documentary they expected.
Daggett is blackmailed by the government into becoming Muscular Beaver once more in order to fight a hundred-foot-tall rampaging splinter. Norb is forced to come along as Muscular Beaver's new sidekick. Hilarity ensues.
The Beavers squabble over who is best friends with Stump (their tree stump friend) and Norb reveals hurtfully that Stump was "transplanted." When a confused Stump goes off in search of his natural family, the boys follow after him with comedic results.
When Treeflower re-enters Norbert's life, he expects their love to blossom once more. However, Norb didn't count on the lure that large trucks have for beaver women, and loses Treeflower to Dag's arch enemy: Truckee the truck driving shrew.
The beavers discover an old trunk with 16mm film inside. They assume that they have discovered Oxnard Montalvo's unfinished horror film masterpiece, and set about to complete the film as an homage their hero. Once finished, the film is not exactly what they expected.
When Barry the Bear decides to revive his singing career, he embarks on a search for The Groove. Norbert attempts to help Barry in his quest, but feels embarrassed by Daggett's lame attempts to tag along.
Daggett and Norbert learn how to mark territory with their scent glands. Their fraternal jealousy kicks off a marathon of territory claiming across the dam, the forest, and the entire country. The boys finally learn their lesson at the hands of some rather smelly lumberjacks.
When Daggett stumbles onto a tribe of girl raccoons while out searching for knot holes, the tribe mistakes him for an ancient god. Norbert now has to snap Dag out of his delusions of grandeur, in order to save him from himself and the raccoons.
Norbert falls under the influence of slimy pond scum and becomes possessed by the spirit of un-goodliness. The Evil Norb causes undue harm to his neighbors until Daggett comes to the rescue.
When Norbert and Daggett say the same thing at the same time, they play a game: the first one to speak gets a moogy-pinch. The boys spend the rest of the day trying to trick one another into speaking.
Daggett is mistaken for the long-extinct Horned Beaver two bumbling scientists. Their zeal to protect such a rare animal quickly becomes dangerous for everyone around Daggett.
The forest is invaded by the Beavers' mortal enemies: lumberjacks. But these guys don't just cut down trees--they sing musical theater as well! After several failed attempts at dispatching the loggers, the Beavers challenge them to a winner-takes-all Timb-O-Rama that levels the entire forest. Daggett and Norbert win, but are left treeless.
When Norbert takes the rap for Daggett and gets sentenced to some "hard time" at the zoo, a guilt-ridden Dag vows to break him out. The zoo, however, turns out to be an idyllic, Club Med-style resort for animals. Dag's various harebrained rescue attempts eventually "succeed," totally destroying Norb's zoo paradise.
While on their way to a local sports coliseum, Daggett annoys the bus driver who accidentally drives the bus through "a hole in the fabric of space and time." The boys end up at the real Roman Colosseum, where Daggett picks so many fights both beavers are forced to become gladiators. After surviving man-eating lions and the dreaded Two-Eyed Cyclops, the Beavers lead Caesar's army on a madcap chase that topples Rome.
Daggett and Norbert discover an enormous fish egg worth a bazillion dollars (and that's a lot!). The situation turns ugly when gold-fever hits the boys. Each beaver tries to steal the egg for himself, upping the ante each time, until they learn a lesson about greed at the hands of the fish egg's mother.
Daggett and Norbert learn how to mark territory with their scent glands. Their fraternal jealousy kicks off a marathon of territory claiming across the dam, the forest, and the entire country. The boys finally learn their lesson at the hands of some rather smelly lumberjacks.
Daggett and Norbert vie for their baby sisters' affection when the two girls are left in their care for the weekend. While self-proclaimed child care expert Dag maps out a detailed itinerary of ""fun"" stuff to do, Norb kicks back and lets them do what they want. Neither plan works, and pandemonium reigns.
Daggett accidentally wins a magic bowling ball from the mystical Lady of the Lanes. Now able to hit a strike on every throw, he winds up in a high stakes tournament to free the bowling alley from the bowling, bullies, the Otto Brothers. However, he needs his brother's help to win, and Norbert wants no part of the game because of a bowling trauma he suffered years before.
A monster storm washes the Beavers out of their dam and strands them in a scary Dixieland bayou. At first, Norbert dismisses Daggett's fears about the swamp, but soon the two are running for their lives, pursued by zombies, a Swamp Witch and a man with an alligator head who want their beaver teeth for a special voodoo potion.
Seeking to earn money for a set of cool rubber horror-movie masks, the Beavers become waiters at a fancy French restaurant. Disaster ensues as the boys misinterpret both the diners' and head waiter's requests. Fortunately for them, it's a French restaurant, so the patrons expect abuse from their waiters.
A botched magic trick leaves the Beavers completely fur-less and tied to a pole. Faced with the embarrassing task of getting back to their dam, Dag freaks out. Norb, however, revels in his nakedness, pushing his brother to get over his hang-ups. Eventually Dag does, with the help of a cheerful song about furlessness they learn from a herd of singing sheep.
After Daggett commits the ultimate offense against a brother--farting on his head--Norbert vows revenge. Dag goes mad with paranoia anticipating Norb's retribution. Meanwhile, Norb forgets he even made the threat--or does he?
