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.

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

Camp Everwood seems like the perfect opportunity for Tommy's horror movie to take flight, especially when they learn the curse of Camp Everwood. The camp package contains brain-eating zombies, missing settlers, creepy pioneer Rock, the worst musical in history [Starring--who else? Angelica Pickles] and a mystery that is just dying to be solved. But when people start to go missing, can Tommy and the gang figure out just what happened on that same soil, over 100 years ago? A 1 hour long movie special that will have you wishing you'd brought your night light to bed with you.

When Chuckie's biggest competition in the election for School Safety Commissioner is Dil's imaginary alien friend Izzy, you would think he would have it in the bag, right? WRONG! When Izzy becomes more popular than Chuckie, can he even rely on his friends to help him win?

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.

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.

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?

As Phil and Lil's birthday nears, the twins realize that they are more different from each other than they think. Phil is getting to like girls, and Lil is wearing a pink training bra. After a shocking incident, they decide to have separate parties for the boys and the girls as they try to out-prank each other.

Tommy is getting annoyed by Dil's eccentric behavior, and he wants some space from his little brother. When the gang visits the Cirque Extravaganza Day Camp, Dil meets a whole group of kids who are just as eccentric as heÿis who invite him to join their troupe permanently. Will he choose his new circus friends over Tommy?

Tommy's girlfriend, Rachel is moving away, and he's cool with it, but is not sure why. However, his friends think otherwise, believing him to be in denial. Tommy tries going about his life as normal, but everyone keeps trying to show him compassion, annoying him greatly. Tommy is advised by Dil to go along with the plan so his friends will leave him alone. However, when Tommy hooks up with another girl, the gang unexpectedly have Rachel show up to surprise Tommy. Seeing him with another girl so soon is too much for her to bear, so she walks away again, leaving Tommy to cry for real this time. Chuckie then shows up at Tommy's house to comfort him.

In the series finale, When Tommy forgoes going to the traditional opening day ball game outing with his Grandpa in order to patch things up with his former girlfriend Rachel, Lou takes Dil instead. This makes Tommy jealous as he and Dil compete to be Lou's favorite grandson during a fishing trip.