Sam Waterston, who’s played “Law & Order” DA Jack McCoy for more than 400 episodes, is leaving the NBC warhorse. His last episode will air Feb. 22. Waterston, 83, will be replaced by Tony ...

The longest-serving actor on Law & Order is officially leaving the legal drama after appearing in over 400 episodes. Sam Waterston is ... 63, will replace him on the series as the new district ...

ET flashes back to Sam Waterston’s first on-set ‘Law & Order’ interview from 1994 following the announcement of his departure. Sam Waterston played Jack McCoy for the last time on 'Law ...