When the TV breaks down, Norb and Dag try to do something fun.

One day, two beaver brothers named Norbert and Daggett Beaver are kicked out of their parents' dam after their mother Rose gives birth to their little sisters Stacy and Chelsea and are forced to find a place of their own. However, this task proves difficult due to Norbert and Daggett's constant arguing and bickering, which is mostly due to Norbert’s laziness.

---

The night after the brothers move into their new dam, Norbert and Daggett both get the idea to stay up all night just like they've always wanted. However, all throughout the course of the night the brothers get more and more sleepy and try their absolute hardest to stay up as long as they can.

After facing many problems trying to solve a flooding situation in the northwest, the government decides to hire Norbert and Daggett to dam up two rivers named The Big Happy and The Little Meanie, with Norbert being assigned the former and Daggett being assigned the latter. Little do they know, even more problems will arise when The Little Meanie actively tries messing with Daggett the entire time and preventing him from finishing the job.

---

Norbert accidentally grows his front teeth to be long, clearly unaware of the danger of his teeth eventually impaling his brain. A fate all beavers suffer by growing their teeth, and a fate that Daggett tries to prevent Norbert from dealing with. However, Norbert ends up being praised for taking such a risk that he ends up being declared "The New Boss Rodent" by all the animals in the forest. Daggett tries ignoring his brother's popularity, but gets pushed to the edge after seeing Norbert getting lots of love and attention by his girlfriend named Treeflower, as Daggett tries to out-cool his brother by growing his teeth as well.

It's Arbor Day, the Beaver equivalent to Christmas, and Norbert and Daggett are excited for the holiday season. Norbert is blessed with a gigantic train set for his present, while Daggett gets a measly pine tree air freshener. Norbert sees this present and offers his brother a gift trade out of kindness, but Daggett declines not wanting to show off his disappointment. All throughout the day, Daggett gets more and more jealous with his brother's trainset and ultimately decides to end his fun once and for all.

---

Daggett and Norbert watch the twenty fourth annual game of Beaver Football as Daggett immediately has his bets on The Beavers, and becomes furious after they lose to the opposing team The Visitors. Daggett eventually decides to take action and make them win himself, with Norbert joining in as the referee. Norbert, using abusive methods, eventually convinces Daggett to just relax and not take the game too seriously, but after a physical altercation with The Visitors, Norbert and Daggett change their minds and make it their goal to take them down.

Wanting to get better cereal prizes than Norb, Dag saves cereal box-tops to get a street sweeper, but takes so long that the time he obtains enough is the time the offer expires.

---

Spawning salmon invade the beavers' lake, and Norb and Dag try to get them to go away.

Not wanting to hibernate in the winter, Dag and Norb take a vacation to the beach.

---

Dag becomes the new ranger of the forest, but power goes to his head.

Dag's hero role playing goes too far, so Norb must act like a super-villain to defeat him.

---

Dag is terrified when a monster fish eats the tip of his tail.

Dag tries becoming braver with "Ninja-Robics" tape.

---

Dag fears a giant cricket that ends up in the dam.

Norb and Dag embark on a space mission to the sun, but they get lost in space.

---

Norb and Dag incessantly "dare" each other.

Norb gets a case of "stinky toe", a rare and incurable disease for beavers, so Dag attempts to help his brother.

---

Norb and Dag decide to become pets and get adopted by an overly normal family.

Dag decides to throw a party after feeling ignored when Norb wants alone time to build a model.

---

Norb befriends Stump and Dag gets jealous.

Norb lives his dream of being a Lipizzaner stallion.

---

Dag and Norb find a brand new water park, so they build their own ride.

Norb and Dag meet a new friend in Bing, a motor-mouthed lizard who becomes annoyingly clingy.

---

Dag writes a note on his eyelids to remind him of Norb's promise a year later.

Dag tries to blow up the hippie concert on their property while Norb falls in love with a female beaver named Treeflower.

---

Norb sleepwalks while watching movies and Dag intends to prove his brother's crazy habit.

Norb and Dag become disco stars.

---

Dag annoys Norb and repeatedly gets bopped into last week in a parody of Groundhog Day.

Norb and Dag get humiliated on a TV show, so the beavers take their revenge on Bill Licking.

---

Norb fakes being sick so that Dag can cater to his every whim, but later, Dag decides that the tables should be turned.

Muscular Beaver and Baron Von Beaver join forces to defeat the giant monster tree.

---

Norb and Dag try to find Stump after Norb hurts Stump's feelings for telling him the truth about his roots (family).

Treeflower has the hots for Truckee, much to Norb's dismay.

---

Norb and Dag attempt to make a film after finding a lost reel.

Dag and Norb attend to find the groove for their friend Barry.

---

Dag learns the beaver defence and use his muck to mark everything that belongs to Norb and his brother is doing the thing with Dag's stuff.

Dag becomes worshiped by the female raccoon tribe.

---

An evil pond scum possesses Norb to do bad things, so it's up to Dag to save his brother.

Norb and Dag jinx one another.

---

The two scientists mistake Dag for a long extinct horned beaver and Norb tries to rescue his brother.

Singing lumberjacks invade the forest and the beaver brothers uses strategy to save the forest.

---

Dag tries to break Norb out of the zoo however Norb's enjoying his new life in the zoo.

Norb and Dag get zapped back in time to the age of Romans.

---

Norb and Dag find a giant fish egg in their pond.

In this double-length halloween special, alien object lands behind the house of Norb and Dag's favorite movie star.

Norb and Dag's two younger sisters visit them, but the brothers disagree on whether to let them do whatever they want or to use a list.

---

Dag becomes a bowler with the help from Laverta Lutz.

Norb and Dag go to a haunted swamp full of zombies.

---

Norb and Dag work as waiters in an attempt to buy masks.

Norb and Dag lose their fur after a botched magic trick.

---

Dag fears Norb will get him back after farting on his brother's head during a game.

Dag and Norb hire Big Rabbit to be their bodyguard after receiving a threatening message.

---

Norb and Dag are trapped in a cave with Stump, whom they try to prevent themselves from eating him.

Dag tries to protect his dam from the howler leeches during a snowstorm.

---

Norb becomes a bed biter in his sleep and he looks for a way to get himself to stop.

Norb and Dag try to protect their ghost friends from being taken away from the two scientists.

---

Continuing from "Up All Night", Dag and Norb return to the present and then attempt to go to sleep, but realize that they're too tired to sleep. As a result, yet more mayhem than the previous episode, such as sheep taking over the house and hallucinations, ensues. When Dag and Norb finally fall asleep, not only do they sleep so long that they become elders, but the sheep take over the entire world.

Dag gets a cold, so Treeflower nurses him and pretends to be Muscular Beaver's new sidekick. Norb gets jealous by this.

---

Laverta Lutz teaches Dag how to win arguments, telling him that "the argument's over when the fat beaver sings." As a result, Dag ends every argument that Norb puts him in by starting musical numbers--until Norb tells him that he actually loves one of the songs and tries to get him to sing it again.

Dag tries to get Norb's toy duck away from the help of a mystical creature.

---

The two scientists accidentally dump a potion of stupidity in the lake, weakening the intelligence of everyone except Dag (since Dag can't get any dumber).

Norb and Dag star in a Western episode and face the robotic Kid Friendly.

---

Norb and Dag try to escape their dam full of wolverines without speaking.

Bing's girlfriend breaks up with him, causing an emotional breakdown. Norb and Dag, however, want to help Bing and his love get back together.

---

Norb and Dag's father visits them, and things get out of control.

Norb and Dag, along with their friends, make up a story.

---

Norb gets an earache as he and Dag are invited to Stump's family reunion.

Norb and friends try to save Muscular Beaver from Toebot's clutches.

---

Norb and Dag bite the magical oldest tree that turns them into kids, so they try to get it to have an acorn to themselves.

Dag accidentally clogs the downstairs toilet while Norb tries to get his hair just right.

---

Norb becomes possessed with his instinct as he packs away to leave the dam.

Dag believes he gave birth to a baby mongoose after a huge meal.

---

Dag carries a list in which the animals think they'll be on when Barry gets hurt with Dag's rocket pen. Norb takes advantage of his friends by taking all of their stuff for promising to get them all off the list. The animals find out the list was harmless. They all go to confront Norb, angry at him for scheming them out of their possessions. In the end, Barry, Bing, and others affected beat Norb up in order to teach him a lesson.

Norb and Dag fight over who will move a Russian spaceship off the roof.

---

Dag joins a biker gang as their new leader and Norb searches for his dimwit brother.

Norb and Dag attempt to win the staring contest for an award.

---

Scientist #1 becomes a beaver and offers the beaver brothers a new future of the world.

Norb and Dag star in a Spanish-speaking episode with El Grapadura.

---

Norb and Dag try to rid a hawk that spreads its saliva everywhere.

Norb and Dag's cousin visits making several home changes.

---

Dag and Norb meet their ugly doppelgängers for a biologically related connection.

Norb and Dag explore deeper of their lake in a submarine.

---

A group of otters takes over Norb and Dag's dam.

Norb is distraught when he finds out that Dag is taller than him.

---

Norb and Dag discover that someone is pulling pranks on them.

Norb and Dag fight over Bing.

---

Dag learns a new game.

The new millennium forces Norb and Dag to recreate the earth.

---

Dag wakes up for springtime and finds Norb going European and Dag tries to get his brother back to his American beaver self in order to re-twig the dam.

Dag abuses the beaver call of distress.

---

Norb and Dag both think they are home alone and invaded by aliens and monster pests.

Norb and Dag build their own bedrooms.

---

Norb and Dag are convinced Barry wants to eat them when they watch Bill Licking's show.

Dag falls in love with a fishing lure attached to his tail, not knowing that she is dangerous because of her "surface" life.

---

Norb and Dag try to get a party ready, but it gets out of control when they begin messing about and enjoying themselves.

Norb makes Dag sell chocolate bars, but ends up trying to sell one for $200 while he eats the rest out of an addiction to chocolate.

---

Dag clones himself, but the clones prove unruly.

Norb tries to help Dag fatten up before the winter, when they plan to hibernate.

---

Dag becomes an underwear model.

Two Canadian beavers take up residence in the brothers' dam.

---

The beavers are visited by a magical Yak (a parody of The Cat in the Hat).
Guest star: John de Lancie as the Yak

While playing golf inside their house, Norb taunts Dag with the promise of letting him drive the golf cart.

---

Norb and Dag accompany Big Rabbit on a visit to his parents' house.

Dag steals a killer whale that wreaks havoc in the brothers' pond.

---

Dag and Norb receive a present from their mother that refuses to open itself until midnight but in the end the present turned out to be from Scientist Num. 1 And Pete.

The Lady of the Lane shows Dag what it would be like if he had never been born.

---

The boys' mother pays a visit, but turns out to be working as a spy.

The beaver brothers are going away to a Tumblebug pageant, so they get their sisters to look after the dam.

---

Dag gives up being Muscular Beaver, to the delight of Baron Von Bad Beaver.

The scientists travel inside a gigantic Dag and attempt to crush Norb.

---

The beavers race a trucker (who is revealed to be Truckee in the end) to the world's largest pile of toenail clippings.

Norb and Dag get a pair of X-ray glasses.

---

During a backyard campout, Norb tries to scare Dag with a story about a maniac with a hook, but soon believes his own story and becomes paranoid in thinking that the creature is coming to get him.

When the dam accidentally falls on Norb's head, he develops "damnesia" and forgets who he is.

---

A raging "volnado" (half volcano, half tornado) capsizes the Beavers' dam upside down during a party and have Daggett and Truckee trapped.

Norb tells Dag to lose the kiddy toys and grow up, but he takes it too seriously and earns himself the name Big Frog.

---

Dag and Norb get jobs at Smelly Jim's Carnival of Mirthiness.

Dag and Norb attempt to save their dam from an army of Australian termites.

---

Norb and Dag take their young sisters to an ice skating show as they wait forever in a long line.

Norb and Dag try to battle off a dimwitted warrior.

---

Norb attempts to save Dag from a band of pirate rats.

Dag and Norb star in a show resembling Starsky & Hutch.

---

Norb and Dag go to the beach and build sandcastles.