Chuckie tries to give a Valentine to his dad.

The babies go on an imaginary tour of America when Angelica and Susie cause some damage at a picnic.

The gang goes to the Fall Festival. When Grandpa moves out, a Reptar robot for Euro Reptar Land malfunctions in his basement. Meanwhile, Chazz starts to play The Dating Game, after Betty gave him a makeover. Betty also had Phil & Lil switch to super-absorbent diapers.

Tommy and the Rugrats give up Reptar for good, and bury all their Reptar stuff in the sandbox.

The Rugrats try to stop Fall by stopping the parade, and they do, with a little help of their former friend, Reptar. And in the audience, someone from Euro Reprar Land is watching, in hopes that it would become an important part of the new theme park. Meanwhile, Grandpa recovers nicely, but ends up coming down with a new disease -- the "Love Bug" -- after a nurse named Lulu brought him back to health. In a bizarre twist, this wasn't the first time they met, yet it was the first time they knew each other.

This episode picks up where Rugrats In Paris has left off -- with the entire gang now back in the good old US of A, with Chazz a newly-married man, and, most importantly, Chuckie gaining a new mother and sister that he likes. But if you think that the Watanabe-Finsters are going to be in a total state of bliss from now on, think again -- as long as there's Angelica, there cannot be total bliss. And who else but Angelica would put a damper on Chuckie's happiness? While Kira studies for a fairy tale play (which involves Cinderella), Angelica tries to trick Chuckie into thinking that he'll be living the same life as Cinderella -- virtually being a slave to Angelica and Kimi, while everyone else gets ready for a party that will celebrate the newlywed couple's adoption of each other's child, a couple of weeks after their marriage.

At the Finsters, Stu builds a treehouse for Chuckie, Kimi, and the other Rugrats to play in. After Kimi took Cynthia from Angelica (without asking, of course) to play in her treehouse, the Rugrats imagine Angelica as if she was a monster from the jungle, a la ""King Kong"".

Dil's pacifier travels around the neighborhood, after it drops out of Dil's mouth.

When Chuckie is afraid of the same things that Kimi likes, he fears that he isn't such a good big brother to her. Meanwhile, Chazz & Kira start making plans for a new business venture -- a coffee house.

At an amusement park, Angelica, now the only only-child in the series, feels left out when she had no brother or sister to join her in a novelty photograph. After Drew mentioned to her that they aren't ready to have any more kids, she starts looking for someone who would make a good brother or sister for her.

When the Rugrats notice that Spike is having a nightmare, they help Spike out of it by giving him the things that help them through their nightmares.

At Edwin's birthday party, Kimi falls in love with the donkey piñata at a party, thinking that it was a "Cuddle Bunny". But when she learns that the kids will bust it open for the candy inside, the Rugrats try to save Cuddle Bunny from its impending destruction.

Since Kira & Kimi came into Chuckie's life, he believes that everything is changing when Kira straightens his hair, buys him new "trap-door" pajamas with feet, gives him sandwiches with crusts, and, worst of all, gives Wawa a makeover.

The Rugrats discover the first thing about magic when they sneak backstage at a magic show at the local park.

The whole family is at the retirement home, visiting Grandpa and Lulu. While Grandpa shows the adults around, Lulu babysits the Rugrats; but once she's distracted, the Rugrats wreak havoc all over the place.

The gang are at the park at night to watch the stars fall. In a fantasy salute to Star Wars, the Rugrats try to keep the stars from falling by fighting the Darth Vader-like force, Angelica, that causes this phenomenon.

To help expand their minds, Chazz and Kira send their kids to the Happy Clown Daycare Center, endorsed by Dr. Lipschitz. Angelica informs Chuckie & Kimi that daycare can be dangerous, as it's where the "scary kids" go to play. When they got there, Kimi ended up having a ball, while Chuckie would rather hide in balls.

The Rugrats set their sights on a staircase post, where it hides one of the Rugrats' greatest mysteries -- why does it wobble?

Howard has laryngitis, making it difficult for him to speak. When Lulu asks if his "cat got his tongue", the Rugrats look for Fluffy, so they can get it back.

After Grandpa told the Rugrats one of his war stories, the Rugrats rescue Dil's bottle as if they're at war.

When Kira & Chazz felt that Kimi is homesick for France, they throw her a party and shower her with gifts, all with a French theme. However, by doing so, they ended up not giving Chuckie any attention.

Angelica & Susie compete in a talent show, with Angelica having the usual unfair advantage, thanks to a little spying, trickery, and Charlotte's usual connections. At stake -- a trip to Cynthialand. Also in the show -- Grandpa & Lulu's dance act, provided that Grandpa's trick back doesn't get in the way.

While Stu works on his latest robotic invention, Didi notices that Tommy likes baths, but Dil does not. While she gives both babies their baths, a fantasy sequence reveals the answer -- Dil imagines that he's sailing in the rough ocean.

Chuckie's afraid of losing his friends after the Rugrats are attracted to Kimi's adventures.

When Angelica decides to play "business luncheon", the Rugrats wanted to play too. However, Angelica told the Rugrats that they can't play unless they're able to wear grown-up clothes, tell jokes and not wear diapers -- her idea of growing up. Susie tries to make the Rugrats grow up, so they can join Angelica.