If you left the TV on the NBC channel sometime since 1990, odds are you would hear the narrator, Steve Zirnkilton, begin a disclaimer with: “In the criminal justice system…” signifying a new episode or a re-run of Law & Order. The show utilized real crimes that made newspaper headlines with dramatized investigations, making it an incredibly compelling and relevant show on television. It is also one of the longest-running primetime series, falling just behind its own spin-off, Law & Order: Special Victims Unit. It’s managed to stay fresh by using a huge list of starring cast members as detectives for different investigations, like Jerry Orbach (Murder, She Wrote), Chris Noth (Sex and the City), and Benjamin Bratt (Traffic). It also had various guest actors whose faces were immediately recognizable, including Robin Williams (Good Will Hunting), Julia Roberts (Pretty Woman), Robert Downey Jr. (Iron Man), and many more.