After Stu sells an invention, he tells the kids that he's splurging on a built-in swimming pool. While digging up the yard, the construction crew unearths the Rats' old mechanical Reptar toy. The kids fondly remember it, but decide to throw it away, until, during an electrical storm, they become convinced that they've angered Reptar. They ultimately decide to rescue the toy, and realize that, although they're growing up, they can't forget their past.

As babies the Rugrats used to dream about being cowboys, and as tweens they finally get to make those dreams come true! When the gang is invited to spend a week at a dude ranch, will Tommy and his city slicker pals adapt to the ways of the old west?

It's soccer season and as per usual, Phil has soccer-on-the-brain. But when Lil casually joins the team, she surprises everyone, including herself, by instantly becoming a super star. At first Phil is excited about having another soccer-head in the family, but when Lil outshines him, he starts to resent her. When Lil finally realizes how upset Phil is, she has to decide whether to walk away from something she loves or continue to play and risk pushing away her only brother.

On a trip to a mountain resort, Tommy develops his first crush on a girl named Olivia, another guest at the lodge. Chuckie becomes a third wheel, and feels alienated when Tommy prefers spending time with Olivia instead of helping him overcome his fear of heights. Tommy has his very first kiss with Olivia. Meanwhile Angelica tries to impress a guy who works as a hiking leader at the resort.

The whole school has caught Yu-Gotta-Go fever, a role playing card game, except Chuckie. When he finally starts playing, it becomes an obsession, and he's hired by Angelica to do her chores in exchange for more cards. He becomes one of the school's elite players, but in the pursuit of an elusive card, he nearly parts with the valuable stamp collection that Chas has passed down to him. It's up to his friends to keep him from getting in over his head.

Tommy and the gang decide to put together a boxcar to compete in the upcoming derby. Can they make it to the finals, or will Angelica spoil their plans by entering her own car in the race?

Susie thinks that Angelica doesn't think much about the future. While Angelica worries about getting a navel piercing, Susie tries to get a scholarship to a good college. So when a school field trip accidentally leaves the two girls stranded in the big city, who will end up having the smarts to get them back safely?

When theres a talent show on and they've got places for singing, Angelica signs up, but Tommy tells Angelica to let Susie know. When Angelica calls, its on the answering machine, but it breaks. Angelica then pretends she's reminding her in front of Tommy, which when Susie comes back to school, eventually believes in Angelica. Meanwhile, Chuckie, Lil and Phil help Ms O'Keats with her part of the talent show, even though its a bit lame and they have to wear weird costumes and do other weird movements. Dil lets them know about Karma and tells them about that afternoon (Phil, Lil and Chuckie pulled a prank in assembly) and if they do something bad, something bad will happen to them, as in them being humiliated in front of the whole school. The next morning, Angelica's face breaks out with zits and comes to Dil's advice. Dil tells her to do good deeds but it just gets worse. At the show, Angelica admits to Susie she knew the answering machine was broken and swaps places with Susie. When Chu

Lil doesn't want to act like twins anymore, she would rather do things on her own without Phil. Soon after, Dil recruits himself as Phil's new twin. However, Lil's new attitude is threatening the family's trip to the Twins Canyon theme park, where twins get in for half-off, if they dress alike. Meanwhile, Chuckie refuses to participate in the mandatory President's physical education exam.

A talent scout feels that Susie has what it takes to be a singer. Her parents, however, object to her concert because they are worried that it will affect her grades. She then decides to fund the venture herself, by asking her older sister for the money.

Kimi befriends ""Z"", and punk kid, and starts to act differently, and even dies her hair pink. Meanwhile, Angelica goes on an online chatline to find advice for herself. Tommy and Chuckie follow Kimi and ""Z"" into an alley way, and have a feeling that they are going to steal something.

Tommy, Chuckie, Kimi, Phil and Lil are trying to raise money to see their favorite band live in concert, ""The Sulky Boys"" But are not even close to having enough money to buy tickets. Until they talk Dil into selling his latest invention the ""belt-quarium, which he made for his new fish Pablo. The belts prove to be a huge success, despite Angelica completly ripping off the idea. But when the fad quiets down, Tommy asks and without realizing it, forces Dil to come up with a newer invention. But when each hot item suddenly becomes lame by each day, Dil is pressured to please his brother and friends with new and more origianl creations.

Tommy decides to enter a filmmaking contest judged by his idol Martin Costomiris. But when his sci-fi movie proves to be a disaster, primarily due to the uncooperative cast, Tommy realizes that what goes on behind the scenes of the movie is far more interesting. Risking his friends, he follows them and secretly videotapes some of their private moments. When the others find out that Tommy has betrayed all of them, he's forced to make a choice: his "movie masterpiece" or his friends.

Chuckie tries to get one of the most popular girls in school, Nicole, to notice him by creating another version of himself named ""Chongo"". Nicole is instantly notices ""Chongo"" not knowing it's really Chuckie. While Phil and especiallly Tommy are less than thrilled with Chuckie's charade. Chuckie soon discovers that Nicole actually likes him as Chuckie, but is afraid to admit to her that he's been pretending to be ""Chongo"". Meanwhile, Angelica takes on the school cook by reporting in the school paper that his food is weird.

When various lawn decorations, such as gnomes, lawn orniments, ect... begin disappearing from the neighborhood everyone suspects Dil as the theif. But when Dil catches Tommy redhanded he decides to take the blame anyway. Which means being grounded and not being able to visit the museum. It is later revealed that Tommy is the thief, only he never knew it, because he was sleepwalking. Meanwhile, Angelica has to mentor a bratty little girl, who is basically a smaller version of herself.

When Betty and Chazz take Tommy, Phil and Chuckie to the great outdoors for rafting Tommy's secret fear of the water is exposed and tested after getting lost. When he was young he had a near death experience and almost drowned, ever since then he's been afraid of the water. But when Phil's life is in danger and Chuckie is too scared to help him out, Tommy must put aside his fears to try and save his friend.

When Tommy's newest film makes him famous, Dil worries that his big brother might forget all about him. Meanwhile, Angelica trains Chuckie on the fine art of lying.

Grandpa Lou takes over Stu's job of chaperone for the class field trip to the Human Body museum, and starts to embarrass Tommy. Meanwhile, Dil is hospitalized for a throat infection.

The kids try to get a date to the Valentines Day school dance with their crushes.

Dil is convinced that aliens are coming. Meanwhile, Angelica tries to be a nicer person to get Sean's attention.

The kids take an aptitude test to get a clue as to what they want to be when they grow up, but they are not happy at all about the results.

An older girl, Francine, picks on Tommy. Angelica is loving every minute of it! Does Francine like Tommy, or is she just a pest?

Kimi becomes obsessed with her Japanese heritage when she and the gang have to search their family trees as a school project.

Angelica has been invited to Savannah's party and she has to find a dress that hasn't ABW (Already Been Worn). While working at the hospital she suddenly breaks her nose and fakes a dilemma. Meanwhile Tommy, Chuckie, Kimi, Phil and Lil are doing community service week and part of it doesn't go according to plan.

Savannah, the prettiest, most popular girl in school, who Angelica practically worships, decides to throw her party on the same day as Angelica's! Tommy and Chuckie, being amazed that somebody could actually out-mean Angelica, use Savannah's obsession with Senor Jumping Bean to ruin her plan!