The “Law & Order” universe is one of the biggest and longest running on television.
It all started with “Law & Order,” the brainchild ofDick Wolf.
The series began airing in 1990, but began filming late the prior year (perIMDb).

That’s not to say that there wasn’t any filming going on in the Big Apple.
At the time, the city’s streets were re-created again and again on sound stages in Los Angeles.
The union heard him out and decided to offer up some concessions.

It’s worked for him and the countless other shows that followed suit in the years since.