Other mistake: When the kids are playing "Carry On Wayward Son," there are no notes on the TV in the one area. However the boys play the notes there and get it right.
Take Me out of the Ball Game - S3-E24
Other mistake: When Peggy strikes Bill in the head in the softball game, he gets hit on the left side of his head. Later in the scene he is using an ice bag on his head but he's icing the other side.
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".
Other mistake: When T.J. types in his height instead of Floyd's while searching for his dad's date on the computer, he never pressed the "Enter" key.
Other mistake: In one scene in this episode, the clock on the kitchen wall (behind Jake) does not have any hands.
Other mistake: As Kai's squadron are approaching The Fore Shadow, the ship begins to fire its massive web like plasma waves at the planet, and fires over and over continually. Except in close up shots as Kai's squadron are flying around it. Like it completely stops firing in closes ups, though when cutting away suddenly blasts are close enough to it that they would have been coming out during those close ups. (00:03:05)