A favorite toy of Theodore’s is lost on a rafting trip but then mysteriously shows up at the house…and it’s alive! Alvin wants Dave to take a DNA test to see if he’s a famous explorer or king, but maybe it’s a person much scarier.

Miss Croner attempts to help Theodore discover his true calling in life. Jeanette is suddenly the clumsiest person on the planet. Is there something wrong with her… or her new glasses?

Theodore gets roped into doing Alvin’s babysitting sitting job with a spoiled four year old. Kevin agrees to be Alvin’s assistant to get closer to the music industry, but ends up running errands instead.

When Alvin accuses Simon of being too safe, Simon agrees to do whatever crazy thing Alvin wants him to do. A cute singing bird replaces Alvin in the band after Alvin makes too many demands as a performer.

When pirates show up at the house, the boys do all they can to protect a treasure chest that arrived for Dave. The Chipmunks and Chipettes compete to set a world record in hopes of winning a new virtual reality game.

When Alvin talks Dave into buying a used tour bus, Dave has no idea of the problems ahead. Alvin signs the Chipmunks up for a game show that forces losing contestants to perform dangerous stunts.

When Alvin accuses Dave of yelling at him too much a therapist moves in to help Dave control his anger. When the school digs up an old high school time capsule, Miss Smith and Dave work together to keep an old secret.

The Chipmunks and Chipettes compete in a dodgeball tournament but no-one expects Theo to be their secret weapon. The Chipmunks find a shack that magically fills with toys and games, but is it magic or something more sinister?

When Theodore mistakenly thinks he’s the oldest brother, he tries to be a better role model for Alvin and Simon. Alvin tricks Theodore into believing he’s great at mini golf which backfires when Theo signs up for a tournament.

Dave is thrilled when he thinks he’s nominated for a Grammy, but it’s actually an award for aging musicians. Alvin and Kevin pretend to be sick to miss school and sneak off to the Dagarack Convention.

When an exchange student comes to visit, he tells a scary story that make the chipmunks think Dave is in danger. Annie and Amber offer to plan Brittany’s birthday party, pitting her against Jeanette and Eleanor in the process.

Theodore helps Simon to try and get past his perfectionism in order to complete an art assignment for art class. Simon has a crush on the babysitter and secretly prepares a romantic dinner while Theodore keeps Alvin distracted.

To land the lead role in a play, Alvin wagers Brittany that he can remain in character as a shoe cobbler. When Brittany becomes convinced she’s a long lost princess she carries her new royal status a little too far.

Coach Dobkins kicks Cheesy and Theodore off the track team for being slow, but Theodore is determined to compete. To celebrate “World Day” and win a trip, the Chipmunks each get a country to represent for a school presentation.

While training for a TV baking competition with Eleanor, Theodore develops an allergy to an unknown ingredient. After a lice outbreak that closes the school, Dave sets up a classroom in the house acting as their teacher.

When Derek overhears that Alvin and his brothers are alone for the weekend, he plans a wild party at their house. Theodore is hit by lightning and believes he’s like his comic book hero, until he’s told he’s actually a villain.

The boys disobey Dave’s orders to not play a dangerous game then have to hide their injuries when they get hurt. The school newspaper has a sudden increase in sales when a gossip column appears poking fun at other students.

Jeanette and the Chipmunks orchestrate a break-in at Bocarter’s house to rescue a chimpanzee he keeps in a cage. Alvin is alarmed that Dave will be hosting an auction where he’ll have to tell jokes because he’s not that funny.

Alvin sneaks into Simon’s new virtual reality game and is transported to a world in desperate need of a hero. The chipmunks discover Officer Dangus has a twin brother that’s a bully and encourage Dangus to stand up to him.

Alvin wastes his entire summer playing a video game then tries to do all the fun things he’d planned in one day. Simon invents a robot with emotions and an ability to learn which backfires when he’s exposed to the internet.

The Chipmunks try to keep Dave from getting on the internet after a performance he posts gets negative comments. The Chipmunks along with Kevin and Cheesy decide to crash BoCarter’s birthday yacht party after not being invited.

After caring for a sick Brittany, Eleanor and Jeanette wonder if Brittany would care for them if they were sick. Dave gets an “Instant Gram” account and after several embarrassing posts, Alvin does all he can to stop him.

The Chipettes fall in love with a cute little mouse that’s doomed to be fed to a snake as part of a science class. Simon’s new invention threatens to destroy the world, creating a time loop and changing gravity inside the house.

When Alvin kidnaps Simon’s robot Geizmo, he gets a lesson in parenting a child going through their terrible twos. When Dave takes away Alvin’s phone, the boredom Alvin experiences is enough to drive him crazy.

After getting detention again, Alvin's convinced Dave will drive him to the desert and abandon him there. Alvin and Theodore play a seemingly innocent game, which leads to unexpected consequences

Alvin's attempts to make money as an internet influencer almost drive a local toy store out of business. After the Chipmunks accidentally ruin Dave's new pavilion, they allow Miss Miller to take the fall.

Alvin's too short to ride an exhilarating new amusement park ride, so he devises a plan to sneak on after-hours. On a ski trip, Alvin convinces Theodore there's a Yeti nearby, making life miserable for the rest of the family.

The boys imaginations run wild as Dave disappears, when they find him they're convinced he's a zombie. Alvin tries to convince Dave that he's being hunted by a flying beast.

The Chipmunks don't want to perform in the school play, after learning of its curse. Simon's robot Geizmo becomes jealous of Jeanette's robot Zeela, until a sudden tragedy reveals Geizmo's true heart.

Alvin gets a taste of his own medicine when he zaps Dave with a youth ray, turning him into an irresponsible teen. In an effort to be more productive, Simon invents a device that can override the need to sleep. But does it work?

Alvin sounds the alarm when he believes Theodore has joined a motorcycle gang of vampires! When Brittany declines Alvin’s help for a talent show, he convinces Jeanette to enter, putting them at odds.

When Miss Croner has a disagreement with Miss Miller, she fakes her disappearance to get even. Simon tells Alvin time travel is impossible, until a man from the future shows up at their home.

When classmates claim a local haunted house isn’t that scary, Alvin decides to prove them wrong. When Miss Smith praises Simon’s grades in class, Derek bullies him by not allowing him to use the boys’ bathroom.

Simon’s interactive video game is about to take off, until Jeanette reprograms the game’s villain. When Alvin dreams of joining a private club, he volunteers Dave to play squash, even though Dave doesn’t play.

When Dave suffers from writer’s block, Alvin pretends to write a broadway show, which only makes Dave feel worse. After Theodore sees Alvin accidentally ruin Dave’s computer, Alvin jinxes Theodore so he won’t be able to tell on him.

When the girls at school develop a crush on the Fire Marshall, Alvin decides to be a hero with disastrous results. After causing an accident at a historic castle, Cheesy and Alvin must work as re-enactors to pay for the damage.

Alvin books the band at a birthday party only to discover they’ve been booked for the petting zoo, as the pets! When Alvin tries to break Theodore’s dependence on Talking Teddy, Theodore invents a new imaginary friend.

When Simon falls ill, Alvin takes his place on a camping trip only to discover it’s actually an archeological dig. The Chipmunks don’t know what to do when they suspect Dave is lying about the various awards he’s won.

Brittany hastily enters a skateboard contest against a skate park bully even though she has no clue how to ride. Complaints rise as Simon’s robot Geizmo goes around town dismantling washing machines, but is he actually helping?

To keep a planned vacation, the boys do all they can to stop Dave from learning that Alvin has summer school. When Theodore drops a puzzle piece down a floor vent, he gets trapped inside while trying to fish it out.

When the Chipmunks get stuck in traffic en route to a show, tempers flare between themselves and other drivers. / Simon gets annoyed with everyone asking him to fix things so he decides to play dumb until he gets a “thank you”.

When Alvin insists on taking over the drums from Theodore, Theodore fights back by stealing Alvin’s persona. As Theodore is perfecting a pancake recipe, Alvin plays a trick by pouring burping powder in his next batch.

When Dave learns Alvin blamed him for his poor grades to Miss Smith, Dave sets down a very strict study schedule. Theodore must pose as a dog after the chipmunks accidently shave the fur off a dog Miss Miller is dog sitting.

Mr. Lou: Theo's funky art project becomes a star with its own social media fans, which is great until the page is hacked! Dave writes a hit love song from a poem he found. Since Simon wrote the poem he panics his secret will come out.

Alvin and Brittany wind up in a battle royale over popping acorn tops and bubble wrap. When a cute girl joins the chess club, Alvin enlists Jeanette to teach him how to play so he can join as well

When Eleanor discovers there are no female knights, she hides in a suit of armor and enters a knight competition. Alvin is having the best dreams of his life, until Theodore subconsciously invades them.

When Alvin and Eleanor train to be lifeguards, Theodore is passed over but later manages to save the day. When Miss Croner's prized cherries go missing, she suspects crows - but could it be chipmunks?

Theodore embarks on a quest to find one thing he can do better than Simon, and realizes it won't be so easy. The Munks help a world-famous runner design a pair of prosthetic legs for a race she's set to run in.

The Chipmunks can't wait to go on a World tour until Theodore and Alvin realize what they'll be leaving behind. Alvin invites Dave's old high school rival to an elaborate dinner to prove to him that Dave is a huge success.

Stuck inside the house due to a storm, Simon invents a virtual reality game that quickly gets out of hand. Cheesy enlists Theodore and Alvin to help steal desserts from the school kitchen using secret underground tunnels.