Sam Waterston by Virginia Sherwood/NBC Photo, Linus Roache by Dimitrios Kambouris/WireImage.com Sam Waterston by Virginia Sherwood/NBC Photo, Linus Roache by Dimitrios Kambouris/WireImage.com

NBC and Law & Order executive producer Dick Wolf announced on Tuesday that British thesp Linus Roache ( Kidnapped, Thomas Wayne in Batman Begins) will join the long-running procedural this season in the capacity of executive assistant district attorney - the office formerly held by Sam Waterston's Jack McCoy, who is now the full-on DA.

"I've known Linus' work for several years. He is an actor who totally gets inside his roles," Wolf says in a statement. "I think he and Sam are going to raise the bar and add intellect and passion in the back half of the show."

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