I have been watching the original episodes of "The Twilight Zone." I cannot begin to tell you how many actors/actressess I have seen that have been in Columbo including, Peter Falk, of course. The other night, I saw the woman who ran the art gallery in "Playback." I should make a list of who I see and then post them up on the forum.
I've noticed many Columbo actors in the old Mission Impossible tv show;and many other shows. If anyone gets METV check out some of the shows from the 70's. You'll notice many actors of course from the shows from Universal Studios.