I saw an episode of Matlock recently where he used the exact same technique of catching someone on the witness stand as Columbo did for capturing a murderer. And the circumstances were the same as well. Coincidence? Doubtful. I wonder how many other shows out there (crime shows in particular) run as an alter-Columbo type of series. I've mentioned one, anyone else have ideas along this way?
My curious instinct says that if one puts his mind to it, we can see several spin-off's of COlumbo. But nothing will ever compare to the original.
Stealing one's own material through recycled scripts from other shows is sad to say, a tradition that would go back to the days of radio when an old script would be dusted off to give the writers a respite or when there was an impasse in trying to come up with something.
This was easier to get away with in the days before home video existed and the audience's specific memories of older shows would be rather dulled by time and lack of exposure. Today, I don't think they can let themselves do that kind of thing any longer.