Continuity mistake: When Janet gets off the phone with Clarissa's principal, Clarissa is standing on the right side of her friend. The shot changes and she is now on the left.
Continuity mistake: After Molly tries the experiment and takes off her safety googles, they reappear and disappear randomly when she hugs Ed.
Dear Mallory - S6-E3
Continuity mistake: Mallory starts reading one of her advice column letters to Alex. The letter she pulls from the stack is on blue paper in a blue envelope. After a cuts to Alex, there's a close-up of Mallory as she reads the letter, and then in the next wide shot the letter is on orange paper with an orange envelope. The letter is from a girl who intrigues Alex, so he grabs the orange envelope and starts to tear off the return address. The shot changes to show Elyse walk into the room, and Alex is now tearing the corner from the original blue envelope. When Elyse sits down, Alex reads the address holding a slip of the blue envelope, then starts to get up. In the immediate cut that follows, Alex is holding the orange envelope when he stands up. (00:53:50 - 00:54:55)
The Crab with the Golden Claws: Part 1 - S1-E1
Continuity mistake: When the three bad guys make for the car after taking Mr. Kuraki with them, two of them are headed for the right hand side and the bad guy with the purple jumper runs to the left side. In the next shot the bad guy with the purple jumper is now on the right hand side of the car, pulling the door shut. (00:06:45)
Continuity mistake: At the beginning when the lady at check in is passed out on the floor, she is right up against the desk, but when Lois goes behind to tend to her, she is further away from the desk, and closer to the wall.
Triumvirate of Terror! - S3-E8
Continuity mistake: When Joker zaps Wonder Woman and her mother, they are both standing in front of their thrones and fall forwards. But when Wonder Woman stands back up, her mother, still unconscious, is suddenly off to the side and behind the thrones. (00:11:35)
Continuity mistake: When Dum-Dum cuts the rope releasing Chug-a-Boom from the balloon, we cut to the car and you can see Clyde and Dum-Dum are surrounded by the rest of the Ant Hill Mob, but when we see the two in the next shot, the other members are nowhere to be seen.
A Case of Overexposure - S5-E8
Continuity mistake: In season one episode 16, Arnold says that him and Willis never met their landlord. In this episode they remember him as Mr Darcy - when they see him they recognise who he is.
Continuity mistake: The package Steve received from Mailbox is briefly visible before Mailbox comes in. You can also see a crew member's hand holding the package as Steve grabs it.
Continuity mistake: Wakabayashi is still on all fours, dejected after being bested by Tsubasa. He lost his baseball cap parrying the shot in the right corner, but now both his beret and his wounded pride are towards the opposite side of the goal. (00:05:00)
Continuity mistake: Before Charlie says to Lola "You must double-triple promise you'll never play with it", he places the rocket beside a black box. Later in the episode, when Lola attempts to get the rocket down to play with it, the rocket is now on top of the black box.
Continuity mistake: At the end of the episode, Selina is wearing a purple vest and grey sweater, but they change to red and purple when she is holding Isis and watching Batman, and they change back to purple and grey as she cuddles Isis.
Continuity mistake: When the gang first arrive at the stately home Albert parks his car next to a coach. When the camera angle changes the car has moved back a few yards, and when the gang leave the car has changed position completely.
Spider's Little Daddy/Tricycle of Terror - S3-E1
Continuity mistake: Mandy's working on her report. The page she's on says "CORN by Mandy." A moment later, she writes the same title on another page.
Emergency Marineville - S1-E11
Continuity mistake: When the second group of Spearhead jets take off from Marineville there are only two jets, but in the next shot you can see three jets, and in the next shot there are two again.
Continuity mistake: During "Jeopardy", Wakko chooses the category 'United States' for $500. The clue appears on the starting board's lower right corner monitor. Next, there's a closeup shot of the clue, but now more monitors have appeared below and to the right between shots.
Continuity mistake: When Maya sits alone in detention, the door in the corner of the classroom randomly closes itself.
Burple Nurples/Shnitzel Makes a Deposit - S1-E2
Continuity mistake: In "Burple Nurples", Chowder is showing Gorgonzola the Burple Nurples, and there are houses and shops not too far behind Gorgonzola. Later, the camera zooms out, and the buildings are missing.
Continuity mistake: On the school dance KC takes out her earrings and lays them on the table, but when she is locked in the A/V room she has her earrings on. (00:22:17 - 00:23:24)
Bug Off/The Crawl Space - S9-E5
Continuity mistake: In Moving Away, Tommy tells the other Rugrats how they first met when Angelica lied about the nasty things they did. However in the Crawl Space, there is a flashback of Tommy, Chuckie, Phil and Lil playing in the playpen when they were younger. Chuckie is scared of the Jack-in-a-box in that flashback, so the Rugrats could not have met for the first time back then.