After seeing his grandpa go to the bathroom so many times, Tommy Pickles wants to find out what a "great white thing" (toilet) is, creating a mess when he investigates.

Tommy has received his most favorite toy in the whole wide world – a ball. Angelica, who is always looking to spoil the babies' fun, takes the ball and throws it into the next yard, resulting in the babies risking life and limb to look for it.

Tommy wants to see Reptar, but his parents take him and the other Rugrats, to the Westside Octoplex to see The Land Without Smiles, starring the Dummi Bears, instead. The Rugrats leave the Dummi Bears to go look for Reptar (showing at the same theater), leaving a path of destruction behind them.

Phil and Lil make a brief appearance in a diaper commercial, and they tell Tommy about it, as well as the mayhem they cause in the process.

Having the desire for the Kingfisher 9000 (a top-of-the-line sports boat), Stu and Grandpa enter Tommy into a beauty contest by placing him in girl's clothes and a wig, naming him "Tonya". Their main competitor is Angelica, who complicates the competition.

Being mistaken for the son of millionaire Ronald Thump, Tommy is kidnapped by some thugs, Bob and Mike. The thieves soon find that kidnapping Tommy is more trouble than they thought it would be.

At a picnic, Grandpa is warned to keep his dentures in his mouth. However, he removes them regardless, and Spike steals his teeth while he is busy with the food. Tommy and Chuckie try to get the teeth back because the war veterans are having a concert at the picnic, and Grandpa needs his teeth in order to play the trumpet properly.

After seeing a Frankenstein-type horror flick, Tommy and Chuckie want to see whether Stu is a human or a robot. Stu, however, has a recurring sleepwalking dream, in which he is the host of a cooking show. Tommy and Chuckie accidentally wakes him up after using a wrench on his belly button and Didi calls him out for not going to see a psychiatrist in dealing with his sleepwalking issues.

The Pickles set up a haunted house for the neighborhood children on Halloween. As treats, they pass out "Reptar Bars", which contain "chocolate, and nuts, and caramel, and green stuff". The Rugrats go to the haunted house to search for them, eventually scaring Angelica and Grandpa as well.

On advice from Dr. Homer, Tommy's dentist, Stu, and Didi take his bottles away from him and try to coax him into drinking from a sippy cup. He isn't happy about it and wants his bottle. Even Grandpa agrees and this leads to an argument between them when he attempts to keep Tommy on the bottle. Stu and Didi later agree to return him to the bottle after Grandpa convinces them to see how unhappy he really is with the sippy cup.

While Didi and Betty go shopping, Stu and the guys babysit the Rugrats while watching the "Ultra Bowl XXXVII" on TV. Later, Grandpa gives Tommy a bottle of chocolate milk; Angelica, who normally thinks that she is too old for baby bottles, fights Tommy over it, which sends the Rugrats into their own "football" game over the bottle.

Angelica brings Fluffy, her pet cat, to Tommy's house. Fluffy ends up making a mess of things, but Angelica blames Fluffy's crimes on Spike, so the Rugrats attempt to prove him innocent.

The Pickles experience car trouble en route to the Grand Canyon/Grand Canyon National Park in Arizona. Eddie and Ace, a couple of crooked auto mechanics working at "Twin Cactus Auto Repair", try to make a simple, cheap thing more expensive, but Angelica and Tommy inadvertently stop them from further damage while playing in a "canyon" of tires.

Chuckie has a difficult decision to make: spend the rest of his life in diapers, or learn to use the potty. A dream has his friends forcing him on the toilet, which inspires him to use the potty for the first time.

After wandering away from their fathers, Tommy and Chuckie unwittingly end up playing around in a closed toy store, which they never want to leave. However, they become terrified of an electronic gorilla toy named Thorg who wants eat and try to get a giant Reptar toy to help them.

While Didi is running some errands, she leaves Tommy at a maximum-security daycare center. Desperate for freedom, Tommy contemplates escaping with help from the other babies there.

Tommy and Chuckie match wits with Prudence, a.k.a. "The Junk Food Kid", the local playground bully at a Wild-West-themed playground.

Angelica falls in love with Dean, a biker-type kid who is described as "a 4-year-old's dream on a 5-year-old's bike". However, her heart is broken when he pledges his love to someone else: his mother.

Stu falls off the roof while attempting to install his new "Quack-O-Matic" weather vane. Suffering from a strange amnesia, Stu reverts to his childhood (as "Stuie") and becomes one of the Rugrats. The babies have fun with Stuie for a while, but Tommy soon starts to miss his father which leads to him returning to his original self.

While working on the anti-gravity playpen (his latest invention), Stu blacks out the neighborhood. Being afraid of the dark and wondering where the light is hiding, the Rugrats look for the light in the most logical place: the fridge.

The Pickles family reunion is held in Iowa, hosted by Hugh Pickles and his wife, Dotti. While there, Angelica tells Tommy and the other babies that reunions are swap meets for babies, with the babies being swapped to different parents.

Grandpa takes the Rugrats to the natural history museum. Later, the Rugrats dismantle a dinosaur while looking for a bone for Spike. Meanwhile, Grandpa locks horns with security chief Sally Payson, while rushing around the museum looking for the Rugrats.

After finding a lizard, which the Rugrats think is "Reptar's baby", they try to present it to him at "Reptar on Ice", an "Ice Capades"-type show. The problem is that the actor playing Reptar is afraid of lizards—and is not too fond of children, either.

Chuckie thinks that he is really a superhero after seeing a taping of "Captain Blasto" (voiced by Adam West).

Aunt Miriam (Andrea Martin) is mistaken for an evil alien by Tommy and Chuckie when she comes to visit.

Dr. Lipschitz (Tony Jay), the famous child psychologist whose advice Didi always follows, visits the Pickles but is not prepared for an encounter with the babies.

Tommy dreams that he and the other Rugrats are captured by aliens that resemble his parents, pet dog, and his grandfather. Angelica steals a planet-atomizing remote from Stuvon (Stu as an alien) and escapes with help from a talking fish. Meanwhile, the babies wander into the ship's control room and play with the controls, thinking that they are toys. This ends up with Angelica being tricked into being teleported to a desert planet and the ship hurling into an unnamed star.

Chuckie's eyeglasses disappear during a game of hide-and-seek, and he has trouble finding his friends without them.

When Tommy's favorite stuffed lion plush gets filthy, Didi confiscates it for a cleaning. Tommy is greatly upset by this, thinking he will never see the stuffed animal again, and Angelica helps Tommy "go bad" to get what he wants.

New neighbors move in across the street from the Pickles, where Tommy helps the youngest member of the family, Susie (Cree Summer), find her new room.

Tommy and Chuckie are afraid of being sucked down the drain, so they clog it in various ways to avoid having to take a bath.

Tommy and Chuckie accidentally lose Angelica's favorite doll, Cynthia, while Stu and Drew wash Drew's boat. While Angelica holds a funeral for Cynthia, Spike manages to find the doll.

The babies mistake a garbage truck for a monster that eats trash.

Chuckie is afraid to go down the playground slide after accidentally getting on a giant slide at a pizza place. After Angelica intimidates him, the babies consult Susie, and she trains Chuckie to be "the bestest slider in the whole wide park".

Grandpa competes in a bowling tournament, where Tommy and the others inadvertently help Grandpa win by exposing his bowling rival (Tom Bosley) as a cheater.

Didi appears on a TV game show.

Guest stars: Alex Trebek and Charles Nelson Reilly

After Angelica saves Chuckie's life from nearly being hit by a gang of big-wheelers, she takes advantage of the debt he owes to her by making him become her personal slave. Until she gets a taste of her own medicine at the end.

Angelica schemes to pull out and steal Chuckie's teeth in order to get money from the tooth fairy.

When the grown-ups hear that Randy Carmichael is having the creator of Dummi Bears over for dinner, the grown-ups invite themselves. While the adults are keen to impress, the babies scheme to ruin it as Susie fears she might have to move.

With Chuckie's hair getting longer and longer, Chas decides to get him a haircut. With Chuckie too scared to sit under the scissors, the babies and grown-ups use different methods to try and show him there's nothing to worry about.

When Susie's brand-new tricycle goes missing, she and the babies suspect Angelica is responsible and put her on trial.

Grandpa moves into a retirement home after feuding with Stu and Didi. During a visit to there, Tommy and Angelica cause trouble trying to get Grandpa back.

Angelica and the babies stage a "circus" of their own after they are forced to leave a real one due to Chuckie's fear of clowns.

Angelica uses vanishing cream to try to steal desserts while Drew tries to deal with Angelica's misbehavior, along with other adults who pretend to not notice her.

The babies think that Angelica has turned into stone after a bad wish. In actuality, it is a statue of Angelica — Drew's anniversary gift to Charlotte.

Susie's older sister, Alisa, babysits for her younger siblings and Tommy, but things go awry when a "monster" appears. There’s been a power cut at Susie’s house called a blackout.

When watching a Reptar movie, the tape breaks. As Grandpa tries to get it working, the babies supply their own ending.

Tommy plays with an inflatable clown that Stu made for him, but accidentally gives it to Chuckie, who has a great time with it. Only when Angelica points out his fear of clowns does Chuckie realize his mistake.

After being bored by Stu's home movies, the babies make "films" about their lives. The home movies are drawn up by the writers' children in this episode.

Angelica accidentally handcuffs herself to Chuckie with a gift that is being sent to charity, and things get worse when she loses the key.

Angelica thinks that she is royalty when she overhears her parents, and schemes to go to her "castle".

The babies pretend that Grandpa's new trailer is a spaceship, and go to the "moon" to find Chuckie's toy.

Tommy wants to shed his clothes to be like his dog, Spike, so he tries out naturism. The other Rugrats join in, with the exception of Chuckie; Stu attempts to keep Tommy's clothes on.

Chuckie thinks that there is a monster, or worse monsters living underneath his new "big boy" bed, but Tommy ventures under it to prove otherwise.

Chas wins ten million dollars from a sweepstakes and lets wealth go to his head.

Charlotte is forced to take Angelica and Tommy to work with her, where they nearly ruin an important business deal.

Chuckie has a very hard time distinguishing dreams from reality.

Chuckie is tired of standing out because of his red hair, so he uses Grandpa's hair dye. He soon finds that not being noticed is not as good as he thinks.

Angelica convinces Tommy, Phil, and Lil that Chuckie is an alien.

Charlotte announces that she may be pregnant, which frightens Angelica to the point of her having a nightmare about being rejected by her parents and her new baby sibling threatening her.

Tired of being picked on by Angelica, the babies meet a boy named Josh, who turns out to be even worse.

The babies create their own TV shows after Stu breaks the TV set.

Chuckie's pet pill bug dies, and he has trouble dealing with the loss.

Chuckie falls for a new girl named Megan who tries to get his attention by bullying him.

Spike looks after some stray kittens while Stu prepares for a barbecue.

Grandpa and the children listen to an old detective radio show from Grandpa Lou's childhood in the 1920s of the prohibition, and the babies imagine that they're living it.

Stu and Drew compete against each other for a TV show prize by filming their children.

Stu takes the babies to the car wash after a little accident. Things get out of control, however, when Angelica takes over the car.

The gang attends a medieval festival, where they deal with a robotic dragon controlled by Stu.

The babies develop a fear of "dust bunnies" when the grown-ups clean the house, who are mindless monsters who look like rabbits but they are made of dust that drag babies to their "Dust Kingdom".

The babies help Angelica with her lemonade stand, but they want some of Angelica's dimes, which she wants to keep all to herself.

After being scolded for his own bad habits, Chuckie tries to potty-train Spike.

The babies mistake fog for being in the sky and try to keep anyone from going outside.

Grandpa has problems sleeping, so the others try to replace his mattress with a better one.

To get the babies' candy, as well as a new and better Cynthia doll, Angelica fakes a ransom and makes the babies think Cynthia was stolen. Believing this, the Rugrats attempt to get Cynthia back. When the Rugrats figure out the ruse, Angelica's doll is found by Spike and she barfs from eating the babies' candy.

Angelica orders food from a deli—and then phones all of the other grown-ups—using Stu's voice-changer invention, which makes her sound exactly like Charlotte.

A mosquito bite causes Angelica to be honest, alluding to the story of Pinocchio.

Chas and Chuckie look after Angelica's cat while she is away and underestimate the difficulty of doing so.

When Tommy saves a baby bird from a runner, he falls into a thorn bush and gets a cut, which frightens him.

The babies take part in a Western spoof to reclaim ice cream coupons from Angelica.

Angelica learns a curse word from the host of her favorite children's show, Miss Carol's Happy House. Not knowing what it means or how negatively her parents will react, she begins to use it in her vocabulary.

The babies fear there is a "bad bug" in Grandpa's bed and attempt to get it out.

Angelica tells the babies that the police officers arrest bad people while Chas is dating a police officer. Chuckie accidentally breaks Chas' glasses and fears that he will be arrested.

Chuckie's latest crush has an over-protective brother.

Tommy is mistaken for another troublemaking baby with a big tooth, but he attempts to prove his innocence.

Chuckie is nervous about riding his new two-wheeled bicycle.

Tommy gets hiccups, and the babies' attempts to scare him do not cure him.

The babies go down to the basement to retrieve Chuckie's robotic Reptar toy.

Chuckie takes in a duck that fled from a construction site, but caring for the new pet soon becomes difficult.

Chuckie wants to be cute again, so he goes through his own metamorphosis.

Angelica tells Tommy that he will disappear after Dil gets his old toys.

Tommy and the babies try to educate Dil, who they believe is not as smart as they are.

Tommy tries to run the household while Stu is out of town on business.

While Stu shops for a used car, Tommy, Chuckie, and Dil imagine the test automobile is a submarine.

Dil gets lost at the bakery, where a cake is being picked up for Didi's birthday.

Chuckie gets a new toy car that wins him popularity from other children at the park.

The babies Tommy and Chuckie meet other babies who are just like each of them at the park but more extreme, a masculine girl and a sensitive boy.

The babies visit a flower shop where they think Dil is infected with "jungle beaver", a mispronunciation of jungle fever.

The babies get involved in a ghost story with characters from Aaahh!!! Real Monsters.

Chuckie, after seeing boxes in his room, moves into the granny flat in his backyard while his room is being remodeled. This was possibly a response to the oldest Millennials moving out, upon maturing in 1999.

Chuckie looks at some careers, including an ice cream man and a librarian.

Grandpa Lou competes in a wrestling match.

The babies go to the zoo, get trapped inside the pen, and end up accidentally freeing the animals when attempting to leave.

Angelica tries to remain quiet to receive toys from the Rugrats.

Dil and Tommy must share Spike.

Tommy thinks he is turning into a monster after getting caught in hair.

Chuckie studies street safety from an officer.

Didi is planting dill plants, which the babies think is baby Dil and attempt to keep the plants from growing.

Angelica makes Dil her "partner" after watching a crime film.

Didi completely re-models Tommy and Dil's room, against their good will.

Chuckie accidentally wets the bed during a dream, so Chas puts him in "training pants". That night, the babies try to keep Chuckie from falling asleep so that he will not forget about waking up to go to the bathroom.

Chuckie destroys his shirt and, since he cannot find a perfect replacement, he fears for his identity.

In an attempt to get Tommy's toy pony, Angelica trades the babies "magic beans", which Dil eats.

Angelica is starting to show symptoms of a cold, but wants to attend a Dummy Bears' show. To keep from being unable to go, she tries to convince the grown-ups that the babies are sick instead of her.

The babies dream that they are smaller than they already are, and that Dil is a giant. They try to get him to take his nap, which proves difficult.

The babies try to get more attention than Dil.

Angelica is a giant from the eyes of the babies in their new treehouse.

Dil's pacifier gets tossed around the house.

Angelica becomes lonely and jealous after watching all the babies play with their respective siblings (Tommy/Dil, Phil/Lil, Chuckie/Kimi.) When demanding her parents give her a baby sibling does not work, she enlists some of the babies to become her siblings for the day. Grandpa Lou responds to Angelica when he recollects his memory as a baby with his grandfather in the 1910s.

Spike has a nightmare.

Chuckie goes through adjustments with his new step-mom, Kira. Kira ends up taking WaWa, Chuckie's prized teddy bear (made by his mother) to clean him up and fix him, which upsets Chuckie greatly. Kira apologizes to Chuckie for all of the changes and returns WaWa to him, who fell into the hands of Dil and returned to its worn out look.

The babies visit a magic show.

Chuckie and Kimi go to daycare.

Tommy finds something weird on the stairs.

Howard loses his voice, and the babies think Fluffy stole his tongue.

Tommy tries to find Dil's bottle in a reception office.

Angelica and Susie compete in a talent contest, as do Grandpa and Lulu. A clapping meter helps decide the winner based on the crowd's applause. Angelica sabotages Susie's performance by stealing her dancing shoes, causing the girl to slip and fall around the stage. The audience loves her performance, and Susie ends up winning.

Dil takes a bath with Tommy and fears the worst.

The babies attend a "lunch party" and must act formal.

Tommy shows Dil how things work, such as the fridge and the toilet.

Chuckie breaks his home's toilet, and the Rugrats take a trip to the appliance store with Chas and Kira to get a new one.

Angelica believes she broke Charlotte's phone and hides it. But not before causing chaos by accidentally calling the police and listing herself as "extreme emergency." She ends up tearfully giving Charlotte the "broken" phone, to which Charlotte assures her its not broken, as the antenna on it breaks all the time.

Stu makes a Dil screen-saver, and Angelica tricks the babies into thinking that Dil is trapped in the computer.

Phil and Lil make a pie their style.

Stu has to wear uncomfortable shoes.

Dil and Spike's perspectives on the world are shown.

The Rugrats play a game of adventure squad.

A follow-up from "The Way Things Work," Tommy explains more things to Dil.

Chuckie loses his first library card and Chas deals with a book fine.

Angelica pretends to be a doctor on the radio after hearing Didi and Betty listen to a doctor on the radio who helps people with their problems.

Kira and Chas hire a guy to help boost Java Lava's popularity, but this unknowingly leads to a game of Hide and Seek.

The babies help their fathers.

The babies believe that Dil has turned into a doll.

The babies mistake a teenager for a real-life version of Angelica's doll while it is being repaired.

The adults try to find buyers for Spike's two last puppies.

The babies seek Lil's ring in a pet store.

Stu and Didi hire a new babysitter for the Rugrats.

Guest star: Amanda Bynes as Taffy

Didi enrolls in college.

Stu thinks Dil is walking after the babies manipulate him.

The babies go to the circus.

The babies go to a video arcade.

The babies fear a mascot.

Kimi gets cast in a movie.

The babies fear an alien invasion.

Phil picks up trash.

Chas thinks of a name for a puppy.

Tommy, Angelica, and Susie compete in a pet show.

Didi, Kira, and Betty go to a toddler clothing sale, where the babies think they will be sold.

Tommy loses his courage, which his friends attempt to recover.

The children go to a cabin that has special memories for Drew, Stu, and Chas and the babies fear that the fountain in the center of the lake at the lodge will rejuvenate the adults.