Warriors and Guardians - S2-E4
Other mistake: You can see the driver in the blue Mustang is driving to the left of the alley, but then when Nolan and the woman detective go to chase him, they go to the right.
Other mistake: In the morgue, officer Thorsen says that Harper can use his reservation at a certain restaurant that evening, and she texts James to ask him out. But Thorsen never told her the time of the reservation, and yet she manages to tell James that it is at 7 pm. (00:22:40)
Training Day - S6-E4
Other mistake: When Tim and Aaron are questioning a suspect, Aaron comes out of the room to talk to Tim and shuts the door behind him. When it cuts back to Aaron, the door is open. (00:09:16)
Answer: Window tool.