In 1994, Post released a CD, called Inventions from the Blue Line. The CD contained several of his well-known themes, featuring NYPD Blue and also including Law & Order, Silk Stalkings and Renegade. In the liner notes, he discussed his late father, Sam Postil, and the admiration for law enforcement officers that Sam instilled in Mike. He also referred to police in the traditional nickname of "blues", as in The Thin Blue Line (referring to the police in general and to police camaraderie). One of the tracks is called "The Blue Line", which Post calls "the comradery theme".