^Well, yeah. L&O is in the vein of classic episodic TV where there's no real continuity between episodes. I daresay if you compared all the date references in the different episodes, there'd be impossible overlaps or too many cases crammed into a single year. In a way, a show like that (or the original Mission: Impossible, most of the time) can be treated as something where every episode is in a separate parallel reality.