Guess you never saw the color episodes of "Gunsmoke" or "Bonazna" same goes on resuse of charaterics! Star Trek even did; If you really think it sticks the first 3-4 years of Law and Order the bad guy in one espidoe about four later or visa versus wasis the defense lawyer or a witness on the streets, etc! They still use it esp. when they use them as "backdrop charectors" with no speaking lines all the better, but speaking lines same, Even in Babaylon 5 the person is a mechanic, the a security officer or an alien viitor can tell by voice on those as many other wise is hard to rell. Even in some of the Ster Trek: The Next Generation, so it was old then nor even today! esp. when shots are able to be done in one day cheaper cost as the actors(es) are paid per day as the extras even if only one or two lines etc. I have lived in Southern California, if look up prior to all the extreme overgerowth, TRUTHFULLY, the same rock back drops used even as current as the "modern movie of The Flinstones" was mostly done at Vasques Rocks in just about 15 miles West of Palmdale or South of Teachapie, Ca. some of the back drop scenes are Catalina Island when need oncean and beahc privately in a few episodes also not far where the aquedactes are in that area listed above there is a state park for the "lake scences with trees in the background " there fly over parts of Alaska are all over this area. Even one of the military scences in one episode, just as current day version of Knight Rider uses the Former Tustoin Air base, as that is the location studio in one of the hangers (old WWII Blimps ) is where the car current version comes racing out of it! Just go with the flow and realize they had about the same budget as KnightRider then 'late '80s but car is cheaper, and airplane stunts of one kind or another is to.   See 1 other reply