TV Sam Waterston leaving Law & Order after 400 episodes, Tony Goldwyn joining as new D.A. Waterston’s final episode airs Feb. 22. By Wesley Stenzel Published on February 2, 2024 02:00PM EST There’s a new D.A. in town. Sam Waterston is ending his tenure as Law & Order 's district attorney Jack McCoy. He's been on the show for more than 400 episodes. Tony Goldwyn is joining the cast as a new district attorney. There’s no word yet on when Goldwyn will arrive to Law & Order, but Waterston’s final episode will air on Feb. 22. He first joined the series in its fifth season in 1994, serving as the executive assistant district attorney for most of his tenure before becoming the assistant district attorney after season 17 and finally a D.A. in season 20 (the show’s last before its revival). Waterston has also appeared in every L&O episode since it was revived in 2022 and guested on four episodes of Special Victims Unit and two episodes of Trial by Jury. Tony Goldwyn and Sam Waterston. Cindy Ord/Getty Images; Virginia Sherwood/NBC via Getty Images Goldwyn is best known for playing President Fitzgerald Grant III on seven seasons of Scandal in the 2010s, though he’s also appeared in massive films like Ghost, Tarzan, Divergent, and Oppenheimer. His feature directorial debut Ezra will release May 31. Goldwyn previously appeared on four episodes of Law & Order: Criminal Intent in the sixth and seventh seasons. He played Frank Goren, the brother of Vincent D’Onofrio’s Robert Goren. However, since Frank was murdered in his final episode on the show, it's safe to say Goldwyn won't be reprising that role when he joins L&O. Law & Order’s 23rd season premiered on Jan. 18. The series airs Thursdays at 8 p.m. ET/PT on NBC. Sign up for Entertainment Weekly's free daily newsletter to get breaking TV news, exclusive first looks, recaps, reviews, interviews with your favorite stars, and more. Related content: Law & Order is back with season 23! Here’s a look at the cast, then and now Kerry Washington reunites with Scandal costars Tony Goldwyn and Bellamy Young to support SAG-AFTRA strike Betty Gilpin was accidentally left in a body bag while playing a corpse on Law & Order