Picky, picky!

In S01E08, Dark Sunday, the cops find car keys at a suspect's apartment which have numbers on them. Using these numbers, they are able to track down the serial and engine numbers of the cars. According to a friend of mine who used to be in the used car business, this is far-fetched. These days when you buy a car which has those keys with buttons you push to open and lock the car, you will usually get another key which is the "master key" with a little metal plate attached that has a number on it. If you need to make another key and you take this master key to the dealer, they can make one (which usually costs a fortune), but they cannot use this number to track down the car, it's strictly related to the locks in the car.

In S02E20, Elegy in an Asphalt Graveyard, the cops are filming in a funeral parlor with a hidden camera. They are outside in a truck watching what is going on on a monitor. When some shooting takes place at the funeral, they have a video record of what happened. They watch this scene later and it appears on a typical TV monitor of the time with relatively mediocre resolution. But they somehow manage to take the picture from the monitor and make a super clear blowup (like you would get from a 35mm camera) so they can see the pinky ring on the finger of one of the people at the funeral and use it to track him down. According to another friend of mine who has dealt with this kind of equipment for years, this is also far-fetched, and that there was no equipment available at the time (mid 70's) which could have produced such a high-quality photo. Too bad about this, because otherwise, this is an outstanding episode!