With all the police procedurals filming in the city, have you ever wondered how to tell the real squad cars from the impostors? It turns out that the city has a special insignia for the imitation-vehicles-- but it's hard to spot. Look closely at the back of the car, however, and you'll see it: TV Unit!

Has anyone noticed the insignia on-screen? Or do you think they edit it out in post-production?

UPDATE: Steve writes in: "That is a REAL police car... TV unit is an NYPD unit assigned to all
Television and Film Productions around the City.. Their function is to guard..protect and facilitate the safe filming of the production."

So if that's true, we're back to square one-- how can you tell the real cops from the fake ones?