Plot hole: Voight and Trudy are sitting in Voight's patrol vehicle discussing Roy Walton and Mark Irwin. They state that Intelligence killed Mark Irwin. After, Voight is shown checking his vehicle for a tracker and bug, which he finds on and in the vehicle. Based on Voight's experience, he should have checked the vehicle first. Also, the case should be done, as the FBI would have heard their conversation. (00:31:03 - 00:32:05)
Plot hole: Kevin is keeping his true identity that he is a police officer from Celeste while Intelligence is investigating a murder committed by one of her art students. Although Kevin is hiding his identity from her, he participated in the daylight search of her art studio looking for the murder weapon. How was Celeste not present during the search of her studio or not aware of the search happening without Kevin being revealed as a police officer? (00:54:04)
Character mistake: A suspect is holding a knife over her head at Jay, who has her at gunpoint. Jay responds, "I'll be better when she drops the gun." Antonio enters the room and yells at Jay, "Are you good?" Jay responds, "I'll be better when she drops the gun." (00:46:46)
Other mistake: Kim uses Gabriela Dawson to translate in Spanish to interview a witness. It could be a legal issue to use a native speaker, but it has been established in a few episodes that Kim is fluent in Spanish. (00:06:15)
Continuity mistake: Season 9 carries straight on from Season 8 - it is the morning after Kim's shooting. The previous night, they were wearing coats and their breath was steaming. Now there is sunshine, green leaves on the trees, and everyone is in T-shirts.
