All front camera shots as the officers are driving show all of the windows of the patrol car fully rolled up, but any time they exit the car on a call or to talk to someone all of the windows are completely rolled down.
When the officers drive away after speaking with Ed Johnson, one can see the film lights and cameraman reflected off of the hood of the patrol car. Also one can see the reflection of the boom mic on the driver's side of the car as well.
When Malloy and Reed stop for code-7 and get out of the car (around 20:40), Malloy locks his driver's side door, but he doesn't lock Reed's passenger side door. This is a major oversight because there is a shotgun cased on the floor alongside the bench seat.
The cast lists Shaaron Claridge, the usual dispatcher, but early in the show, a different voice is heard dispatching.