My son and I spotted it also this past Sunday during the second episode when the motorcycle officer Grant went missing. The scene was in a parking lot with Sargent McDonald standing outside Malloy's driver's window but Malloy's partner officer Reed was also heard talking even though he was on the other side or the car. That's why we were guessing it was for a microphone as there was no in car camera work for officer Reed. The camera zoomed out and Malloy backed away out of the lot and there was no evidence of a boom microphone and you couldn't see the front of the Matador so a quick disconnect of the mic is what we figured. Couldn't figure out why they didn't run it down the passenger's side of the car? I'm too busy looking at the other passing cars, the cars parked on the streets and the ones in the parking lots to always keep up with the episode plot. BTW Jack Webb had the car's windshield remove after the first episode for those on trailer or film screen behind the car scenes. And the inside rearview mirror is always moved up as much as possible. Yeah too much time on my hands at the moment