The show itself was on NBC, iirc. It was cancelled after the 4th season. No idea when it was announced, but clearly the show was being written as if there was going to be at least a 5th season. TNT picked it up for the 2 movies. And for some reason, they wrote the movies as if the show was going to continue forever, but then there were no more after the 2nd one. I think the movies were okay, but again, should have just wrapped things up, epic 2 (or 4) hour series finale, but they failed completely and because of that, you didn't really miss much by not watching the movies.