Continuity mistake: After T.J. has become principle for a day, it shows him chewing out a kid for running in the halls. He throws down a manilla folder onto his desk in anger. However, when the shot changes, the folder has disappeared.
Continuity mistake: When Randall and TJ are walking across the playground, Randall's hair has turned black and so has TJ's hat.
Continuity mistake: Near the end, Gus is standing between the two handball walls. He is looking back at TJ and Lawson, who are near the first wall. But as the camera pans out, TJ and Lawson have moved to the other handball wall.
Continuity mistake: When Menlo tells the crew about Randall's joke book, he loosens his tie, and it's still loose when he says "Indeed." But half-a-second later, as he walks away, his tie is back to normal.
Continuity mistake: When The Library Kid speaks for the first time, you see a shot of the gang, T.J's hat and hair colour are mixed up.
Continuity mistake: When Library Kid sees her kindergarten class, she's wearing a dress, but when she runs into the library, she's wearing a T-shirt and skirt.
Continuity mistake: The Library Kid says her classmates were savages. This is all well and good, except the kindergartners shown are the present day kindergartners.
Continuity mistake: When TJ's friends climb on the jungle gym to try and take TJ's place, we see that Gretchen is the last one up and there is no-one on the bars behind her. But in the next long shot, Mikey is right behind her. Then when it shows a close-up of them, Mikey is gone again; then he reappears a moment later.
Continuity mistake: In the time before King Bob tells his story about being the Prankster Prince, no one is on the jungle gym except TJ and his friends. But after Bob finishes, around 20 kids are on the jungle gym, plus TJ and co. There was not enough time for ALL those kids to get on top of the jungle gym from the time King Bob started his story to the time he finished.
The Spy Who Came In from the Playground - S4-E4
Continuity mistake: After the part where Mikey gets double portions, the school clock shows it is half past one, but a couple of shots later shows the clock at half past ten, what kind of clock does that?
The Spy Who Came In from the Playground - S4-E4
Continuity mistake: When the superintendent arrives at the school, he looks towards Stone who gives him a thumbs up. When he does this, Stone and the group around him are on the steps right in front of the entrance to the school. A couple of shots later, the entire group has suddenly appeared in front of the window without time for all of them to have moved.
Continuity mistake: When Agents Barnes and Noble are passing out the test, there is a boy in a green hat sitting in front of a girl with long hair. The next shot is of the same boy asking if he can use a pen, but now there is another boy with blond hair right behind him.
Continuity mistake: At the very beginning, Gus drinks his entire carton of chocolate milk. Then in the wide shot, his carton is white. Back to a close up, and it's brown again.
Continuity mistake: In this episode, it shows Randall in Miss Grotke's class, but in every other episode, it's never shown him in there.
Continuity mistake: When Randall's dad is talking to the gang about what Randall has been telling him about them (when they are outside, in front of the bouncy thing), his moustache disappears mid-sentence (in a close-up of him) and reappears when he is shown again.
Continuity mistake: When Spinelli gets the ball to play in the field behind the trees, you can see lines that would indicate that the ball was a basketball. However, when the kids are playing kickball, it's obviously a kickball.
Continuity mistake: When Gus is hiding behind the trees at school, no one is standing behind the fence, but in the next shot, the gang suddenly appears behind it.
Continuity mistake: When the gang sees Gus standing next to the tree, T.J. has his backpack on, but when the cops arrive, his backpack vanishes. The straps also change from grey to blue.
Here Comes Mr. Perfect - S4-E18
Continuity mistake: When Jared is talking to the whole school about shunning him, his undershirt changes from white to blue to white again.
Here Comes Mr. Perfect - S4-E18
Continuity mistake: When Jared is holding his speech, Jerome's jumper turns blue twice.
