Does anyone know at what point "Columbo" in the 1990s ceased to be made in multiple-episode blocks and simply be produced as single TVM commissions..?

After the ABC Mystery Movie went off the air in 1990 were they still produced in blocks at all? They were still fairly regular for three or four years thereafter.

Just interested -- would *love* to see a full rundown of production dates for the series!

If you look under episode guide, you will see that season 11 was filmed in 1993/1994 so if that is what you mean by blocks , 1994 was the end of it. After that there were specials, however some of the specials were made before 1994 ( e.g, death hits the jackpot, bird in the hand, no time to die)and the first special made after 1994 is " strange bed fellows" with George Wendt as the guest star which was made in 1995. The last special was "Columbo likes the night life" made in 2003