Law & Order: Legacies is an American police produceral and legal drama created by Dick Wolf as a spin-off of Law & Order. The series focuses on the fictional Legacies unit in the New York City Police Department as they investigate sexual based crimes, crimes against children, hate crimes, cold cases, serial killers, and later in the series cyber crimes. The series premiered on October 2, 1996 and ended on May 16, 2008.
The show originally starred William Petersen as Det. Jason Rice (1996-1999), Amy Brenneman as Det. (later Lieutenant) Alex O'Grady (1996-2008; the entire series), Eddie Cahill as Det. Nick Boyle (1996-2001), Linus Roache as ADA Michael Cutter (1996-2004), and Tom Hanks as Sgt. Mike Vaga (1996-2005). Like the original Law & Order, Legacies featured a constantly changing cast during its run. Some other long running characters include Mark Harmon as Sgt. Max Winters (1999-2002), Bonnie Sommerville as Det. Clara Rhodes (1997-2000), Jonathan Togo as Det. James Amaro (2000-2004), Joe Spano as Det. Tyson King (2002-2008), Cote de Pablo as Maria Sanchez (1997-1999), and Zoe McLellan as ADA Mary Sinfield (2004-2008).
The series ended its run on NBC on May 16, 2008, concluding 12 seasons and 282 episodes. It is the only Law & Order in which the cast changed frequently. Linus Roache later reprise the role of Michael Cutter as a regular in the last three seasons of the original Law & Order.