The producers of Law & Order wanted to last longer than Gunsmoke, but they wound up in a tie for 20 years each. Matt and Kitty look pleased to hear the news that Law & Order couldn't beat them. Here is the TVBR story and the AdAge story (which blames part of Law & Order's cancellation on Jay Leno's bad show). Only Bart Simpson and Dr. Who can out live Marshall Dillon.