The Spy Who Came In from the Playground - S4-E4
Other mistake: When the gang is showing stone their way into the school they go through a vent and all of them manage to squeeze through the small hole in the wall.
The Biggest Trouble Ever - S4-E13
Other mistake: When the court hearing is taking place, T.J. wears a tie with blue and red stripes. As T.J. says to the mayor, "Sorry, sir, may I say something?", the stripes on his tie change to the opposite color for one frame (not counting the stripes on the knot).
Other mistake: When Gus and T.J. are talking on the bench, as Gus says, "No, at least not yet," his watch is missing from his wrist; then it appears mid-shot.
Other mistake: After Dave takes away Mikey's lunch tray, it fades to a shot of the school clock, and there is no 5 on it.
Other mistake: At lunch, when Sam is using a spoon to shape his mashed potatoes on the tray, his right arm clips through the tray just as he says, "Maybe I should clear out the east wall like this." Then, when Sam says, "Maybe I should fortify the south side first," he's using the spoon to move the mashed potatoes on top of the tray, but his arm and spoon are under the tray, so it looks as if the potatoes move on their own. Additionally, when Sam states that he's so confused, the spoon held up in his right hand appears to vanish in the next shot.
Other mistake: When the Ashleys are first shown playing jacks, Ashley T's nose seems to be missing; then it reappears three shots later.
Other mistake: When the Ashleys are playing jacks, Ashley B is wearing her usual yellow sweater, but in the next shot, it becomes red, the wrong colour. It goes back to yellow in the next shot.
Other mistake: When Spinelli tells Gretchen, "Gretchen, what colour is the sky in your world?", Spinelli's neck clips through her dress collar twice.
Other mistake: When Gretchen is in Kelso's Corner Store, Mr. Kelso tells her that if she thinks she got the money in the wrong way, she should just give it back. In this shot, part of Mr. Kelso's shirt collar is incorrectly coloured red; then it changes to its proper tan colour mid-shot.
Other mistake: When Gretchen enters Kelso's Corner Store, the blue and yellow bicycles are slightly cut off at the bottom of the screen.
Bonky Fever - S4-E30
Other mistake: After Miss Grotke asks the class which founding person said that they can't tell a lie, it cuts to a shot that pans over to Mikey. In this shot, all the kids' legs are missing from under the desks. Most of the chair legs are also missing.
Bonky Fever - S4-E30
Other mistake: When T.J. goes to Miss Finster to tell her about Mikey's Bonky stuff, Miss Finster's waistband is yellow when it's supposed to be white. Then, when she takes the bag from T.J., it has changed to pink, then turns white and back to pink mid-shot. Her collar is also yellow in this shot, then turns white and back to yellow mid-shot as well.
