The Scratch - S1-E7
Character mistake: Frankie freaks out about them not having any real books, which is untrue as Brick has a large collection - he is an avid reader.
Character mistake: When Sue and her opponent switch sides right before her opponent smashes her racket, the score in games is 5-1. In tennis, you only switch sides when the sum of games is an odd number (4-3, 5-2, 1-0) for example.