Jack Webb was very loyal. I love how he used many of the same actors in his shows.

How do you know where it was shot?

Did Adam 12 do a lot filming in L.A. itself? Just curious.

In the photo they used here you see a section of brick wall in the background. In the scene as it appears in the "Dragnet" episode "The Kidnapping" they show much more of that building and the surrounding area. Just easy to recognize when it's something you walk/drive by almost daily for seven years.

Agreed. How cool to be that close to a shoot. In San Francisco we literally ran into filming "Streets of San Francisco" all the time! Exterior shots were done done "on the streets." They would lease people's scenic homes . Often took off from work and school just to watch. Too much standing around though!

Oh, wow! What fun! I have always loved visiting film shoots. I didn't visit that Dragnet shoot - it was years before I moved there. But I have two favorite filming site stories.

The Long Long Bus Ride
When I lived in North Hollywood (near that Dragnet location) I worked in downtown Los Angeles, and would often catch the "Freeway Flyer" express bus about a block from that spot for the ride downtown.
One morning I missed the express by about a minute and was forced to take a "local" that wound its way through any number of neighborhoods on surface streets. During the long trek, I frankly sort of fell asleep. When I woke, I discovered I had travelled much farther than I expected, and was now in New York City! Well, at least that's what it seemed like from the NYPD squad cars, trench coats and the presence of Detectives Cagney and Lacey on the sidewalk as I looked out the bus windows from bleary eyes!
What Planet Am I On?
During that same period I worked in two different downtown locations. One day several co-workers and I were walking from a site on 7th Street to get some lunch, when we noticed some very odd signage. Billboards and vending machines which normally hawked cigarettes or US Today instead had stark black and white messages such as "Obey Authority", "CONSUME" and "No Independent Thought". It wasn't until much later, when the movie "They Live" came out that we realized what we had seen, as there was no film crew about at that moment. But it was where they filmed the convenience store scene.

[Bonus Story]
The first downtown location I worked at was the First Interstate Tower, which was the fictional home of "Colby Enterprises" in the Charleton Heston "Dynasty" spin-off, "The Colbys". Never saw any shooting, but I seem to recall seeing the fake signage one time.