The New Kid - S1-E2
Other mistake: At the start when the gang change the time on the clock in the classroom, it wouldn't control the main school clock, plus in every other episode the clock has been operated by The Box on the side of the school, as shown in " The spy who came into the playground".
I Will Kick No More Forever - S1-E11
Other mistake: When the gang go to visit vince in his house, it shows vince watching a video of a kickball game. but kids most definitely wouldn't be able to bring a video camera in to school, and it most probably would be confiscated by miss finster.
Other mistake: In the episode, "the peanut butter kid", he is always eating his sandwich and it always seems like he only took a bite out of it and sometimes it went all the way back to the top. How could that be, he couldn't be chewing the entire time.
Other mistake: When Spinelli says, "I can't believe Gus didn't even show up for school today," as she and her friends walk out of the school, Gretchen's dress is incorrectly coloured green. Two shots later, it is blue again, as it should be.
Other mistake: When the gang enters the Ashley's Clubhouse and catches the Ashleys and Randall taking the treasure, Ashley B's skirt is incorrectly coloured green. A second later, it is yellow again as it should be.
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 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: After Dave takes away Mikey's lunch tray, it fades to a shot of the school clock, and there is no 5 on it.
Beyond a Reasonable Scout - S5-E3
Other mistake: Phil the Scout ties a rope to Mikey's see-saw end's handle to lower Gus down without hurting him. Couldn't Mikey just climb off and hold the see-saw down with his hands and lowered Gus's end down slowly?
Other mistake: When Gretchen tells Mikey, "I'd be happy to help with matters of enunciation and syntax, of course," the soles of Gretchen's shoes are brown, as they should be, but then they turn white mid-shot. The next time we see Gretchen, they are brown again.
