In the criminal justice system the people are represented by two separate, yet equally important groups: the police, who investigate the crime, and the district attorneys, who prosecute the offenders. So begins the acclaimed 1990-2010 NBC drama, whose ensemble (and ever-changing) cast includes Richard Brooks, George Dzundza, Jill Hennessy, Michael Moriarty, Chris Noth, Jerry Orbach, and Sam Waterston.456 episodes on 104 discs. 330 hrs. Standard and Widescreen; Soundtrack: English Dolby Digital stereo; Subtitles: English (SDH); featurettes; deleted scenes; more.