Ding Dong That's My Song - S8-E5
Character mistake: When footage of Dale's gameshow is shown, the announcer states that it is coming to viewers live on a Friday. However, Ash later states that the show was shown to viewers live every Saturday.
Character mistake: While investigating the "robbery" at the art gallery, DS Rivet enters the sterile crime scene without wearing gloves. He not only picks up a vital piece of evidence - a discarded receipt - with bare hands, he allows the salesperson in the shop it came from to handle it, too. Not only has he hopelessly contaminated the crime scene, he has made an important physical artifact useless as evidence.