The 83-year-old acting veteran originally joined the cast in 1994 for the fifth season, and he went on to portray the district attorney on/off through season 23
Sam Waterston says goodbye to Law & Order after 400 episodes ktvz.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ktvz.com Daily Mail and Mail on Sunday newspapers.