Thanks to one of Simon's inventions, Dave and Zelda are accidentally shrunk.
A mermaid faces the human world in a spoof of "Splash."
The boys get a pet in exchange for a pizza.
Officer Alvin wants to arrest a crime boss.
Trip to Europe.
The boys find an alien in the back yard.
Alvin pretends he is a robotic cop from the future that is part chipmunk, part machine, and all cop.
Chipmunks boldly go where no one has gone before in a take on "Star Trek."
Alvin and Simon seek a pearl of wisdom.
When a rash of toy thefts rock the city, Batmunk Simon faces Batmunk Alvin in a spoof of "Batman."
Alvin discovers a giant ape while on vacation and tries to get it back to the mainland.
Alvin's dream of being older becomes a reality when he turns into an adult overnight.
The boys time travel to the 1950s to save their music career.
Alvin dreams of the spirits of Christmas past, present and future.
When Alvin is rejected by a girl for being childish, he attempts to make his brothers act grown-up.
Cruise leads to the Fountain of Youth; Brittany stays on a farm.
The boys attempt to train their puppy but give up when it becomes tough; the boys participate in a troubled opera.
A boy claims he has a personal leprechaun.
Shrinking experiment; modern "Sleeping Beauty."
The boys make science projects to impress their teacher; a family reunion leads to hurt feelings while remembering the past.
Chipettes keep diaries; the gang is transported into an old detective movie.
The janitor gets a chance to sing on stage.
A blow to the head gives Dave amnesia; the Chipettes play matchmaker.
A potion makes Simon a crooner; Dave and Alvin trade places.
Alvin fools with Simon's time machine; Simon's video wins acclaim.
Alvin gets a job at the local zoo so he can buy an expensive toy.
The guys aren't ready for the responsibility of caring for a puppy.
The boys see a horror movie that makes them imagine monsters in their room; Simon loses a cap that makes his family smarter.
The boys befriend a close friend of Michael Jackson; the boys take up strange careers.
The boys adopt a kitten that meets an untimely end.
When Dave imagines a world in which he was never born, he is shown three visions of the Chipmunks' futures without him.
A new kid is better at everything than Alvin; Alvin meets his hero from his favorite television show.
Alvin passes a test that Simon fails; Alvin coaches a Special Olympics athlete.
Alvin tricks Theodore into eating a dog biscuit; Miss Miller attends a high-school reunion.
When the Chipmunks perform in concert at the Berlin Wall, they inspire the Germans to tear it down.
Alvin sees a psychologist to discuss family issues.
Alvin enrolls himself and his brothers in boot camp, where a high-tech robotic jeep shows them their true potential.
A notorious jewel thief is on the loose, and the Chipettes are on the case.
After he throws a wild party, Alvin isn't allowed to go to the amusement park with his brothers and Dave.
Flashbacks to past episodes are featured.
Theodore has a crush, but Alvin accidentally catches her eye; Brittany becomes a quarterback, and Alvin becomes a cheerleader.
While vacationing in Mexico, the Chipmunks team up with a tribe of wild chipmunks to stop a relic thief.
Dave's Uncle Willy comes to visit; when a new Irish boy at school claims to have his own leprechaun, the boys feel compelled to investigate.
The Chipmunks' mother visits, but she has a hard time adapting to modern life after all of her time in the forest.
Dave becomes a rock singer; Alvin is challenged to a fight with a tough kid in his class.
The boys steal a toy from Miss Miller; the boys learn a lesson from a story Dave shares with them.
When they find themselves without a TV, the Chipmunks wonder what they'll do for entertainment.
When Alvin wants to buy a toy, and nobody will lend him money for it, he gets a job at the zoo.
Alvin and Simon work together to help Theodore pass his history test.
The boys want separate rooms; after watching a detective movie, Alvin thinks the baby sitter is scary.
The Chipmunks and Chipettes are given detention for knocking down the school statue.
When Dave finds love, the only obstacle to marriage is his paramour's own three boys clashing with the Chipmunks.
Simons hosts his own show in which he investigates robberies as Sherlock Holmes.
Brittany has a dream in which she and Alvin are a detective team and Simon is their adversary.
The Chipettes vacation in Hollywood; a cut-rate travel service to bring the Chipettes to New Orleans is the only way they can find to get there.
Simon builds a machine to view possible futures when Alvin wins a contest; the Chipmunks and Chipettes are thrown off from a cruise.
Alvin gets an advice show; Theodore finds a coin that he believes grants him good luck.
Alvin suffers an identity crisis; in an attempt to be interviewed, Alvin makes changes to Dave's cabin without getting permission.
A scary movie and broken glasses combine to make Simon think alien squids are invading; the boys look for loot from a robbery.
Theodore goes on a diet to slim down for a date; the girls try to raise a mummy from the dead at the museum.
Alvin dreams he is a pastel-wearing cop; a 1950s-themed scavenger hunt at school.
Dave dates a younger woman; Alvin schemes to get a star on the Hollywood Walk of Fame before a canine rival.
Brittany pretends to be a zombie to get her way; Theodore runs away to help save a calf from becoming veal.
After being told that she must do chores to go to a dance, Brittany dreams that she is Cinderella.
Miss Miller gambles compulsively after the Chipettes rig her poker game; Brittany attempts to market her own perfume.
The Chipmunks tell Dave's life story; Alvin becomes jealous when Simon becomes a celebrity in Australia.
The Chipmunks encounter a scheduling conflict; the Chipmunks become overwhelmed by baby-sitting.
When the Chipettes are discovered to be living alone, Dave must find a supervisor for them.
The Chipmunks tour in Switzerland; an elderly fan wins a date with Alvin.
Simon goes on a game show, but when he wins, he catches the flu and his brothers must pose as him for future appearances; Alvin sells Dave's motor home to buy a gold claim.
The origin of the Chipettes is revealed when they reunite with Olivia, their Australian friend.
Uncle Harry tries to con the Chipettes in New York; Alvin accidentally sinks a boat belonging to Dave's friend.
Alvin recruits Eleanor to play soccer; Dave's piano is filled with pudding and thrown down the stairs, and each chipmunk has a different story as to how it happened.
Simon feels unappreciated and stows away on a cargo ship; Dave, the Chipmunks and the Chipettes go to Washington D.C. to lobby the president to save bald eagles.
Brittany tries to join the cool kids at school; Alvin plagiarizes his book reports and Theodore is on the council that will judge him.
When Theodore loses a tooth, Alvin dresses as the tooth fairy; the Chipmunks start their own fire department.
When the power goes out, the Chipmunks think their house is haunted; Alvin gets a crush on his teacher.
The Chipmunks hire a poor film editor for a music video; Alvin suspects Dave of leading a double life.
During a rock concert, Alvin loses his favorite hat; the Chipmunks and Chipettes audition to be in a "Snow White" play.
Dave starts a neighborhood watch to catch a burglar; the Chipmunks get the measles, and Dave becomes sick when he takes care of them.
Alvin tries to change Simon's image; the Chipmunks and Chipettes raise money for a circus and save Pinky, the circus' elephant.
The boys take part in a Kabuki theater; Alvin and Brittany make a bet about Jeanette becoming a beauty pageant winner.
The group is challenged to a roller derby. Alvin must learn to ski.
Alvin tries to get a famous figure skater to appear at the school pageant; the Chipettes volunteer at a hospital.
Alvin and Simon dress Theodore up as a record to try to win a contest for best mascot.
The Chipmunks travel to London; the Chipmunks get jobs at an aquarium so Simon can work on a project.
Alvin decides the Chipmunks need to join a gym; the Chipmunks do good deeds in an attempt to win an award.
A hypnotist makes Dave act like Alvin; Alvin makes a bet with Dave for one of his golf clubs.
The Chipmunks and Chipettes compete; Uncle Harry tries to break up the Chipmunks by making Alvin a movie star.
Alvin, Simon and Theodore all make their own music video for the group; the Chipmunks invest in a horse.
Alvin uses a spy book to solve a real mystery on the Orient Express; Alvin and a rich kid compete for a girl's affections.
The Chipmunks get jobs as vendors at a baseball stadium; Alvin and Brittany run against each other for class president.
The Chipmunks sell cookies to help out dogs; Alvin believes he is cursed by a Hawaiian medallion he finds on the beach.
Dave drags the Chipmunks unwillingly on a camping trip; Charlatan chipmunk Harry returns and pretends to be Santa Claus.
Alvin shows a bully the magic of ballet; overwhelmed by fans, Alvin switches places with a chipmunk from the woods.
After he is bumped on the head, Alvin believes he is an angel, and he gets into trouble with his good deeds.
The boys enter a contest so that they can win a chance to sing with Dolly Parton; Dave has a nightmare that he is getting smaller and smaller.
Alvin decides to change the Chipmunks' clean-cut image to a punkier, more rebellious one in order to gain more publicity; the Chipmunks start a singing telegraph service to help buy some golf clubs for Dave's birthday.
Alvin convinces Theodore to dress up as an alien to attract more fans, but the plan backfires; Alvin, Simon and Theodore go in search for a mother to attend their school Mother's Day picnic.
Theodore enters a wrestling exhibition and goes up against a monstrous Russian wrestler called Ivan the Terrible; the Chipmunks meet their grandparents for the first time.
The origin of the Chipmunks is revealed, including how Dave ended up with them in the first place, as well as how their musical career got started.
Alvin tells a girl that he likes that he will be performing in a TV concert that he hasn't secured; Alvin accidentally helps a jewel thief.
A charlatan chipmunk named Harry claims to be the Chipmunks' long lost uncle; the Chipmunks create a robot, but it goes berserk.
Bullies steal Dave's antique pocket watch, and the Chipmunks enlist the aid of Mr. T to retrieve it; the Chipmunks meet Brittany, Jeanette, and Eleanor for the first time.
Alvin wants to be a member of the monster club.
Alvin thinks the Easter Bunny is really a chipmunk.