4x17 Time Heals (1)

This is a list of the "Law & Order" and "Chicago" franchises, which frequently crossover with each other, as well as other TV shows and movies they crossover with, or at least share the same universe.

Inside every great show is a 22- to 60-minute story that stays with you forever

https://www.rollingstone.com/tv-movies/tv-movie-lists/best-tv-episodes-of-all-time-1235090945/