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Sarah Clarke

David Livingston/Getty Images

NCIS is beefing up its cast for the last two episodes of the season. 24 veteran Sarah Clarke has been cast as Tess Monroe, an FBI Special Agent who is transferred from New York City to DC. Right now Clarke's just in the final two episodes of season 13, but she could be sticking around next season.

"We feel so fortunate to have Sarah Clarke joining us to play Tess," Gary Glasberg, executive producer and showrunner of NCIS, said in a statement. "I've been a fan of her's going back to 24 and more recently Bosch. She's a gifted actress, a total pro, and we can't wait to introduce her to our NCIS family and have some fun."

Tess Monroe is described as "quick-witted, tough and shrewd." She's a multiple divorcee with no kids and thinks of her team as her family. She's no-nonsense on the outside, but has a big heart underneath with a belief in honor, justice and doing what's right. She'll fight to protect the values she holds dear, and her team, with determination and a bit of sarcasm.

Clarke's other credits include Twilight and Amazon's Bosch. Will Clarke's Tess Monroe have a hand in Michael Weatherly's exit from the series? Tune in to find out.

CBS recently renewed NCIS for two more seasons after star Mark Harmon signed a new deal. The series is the No. 1 drama on TV and the No. 1 drama in the world with 55 million viewers around the globe.

"It's extraordinary that in its 13th season and with over 300 episodes to its credit, NCIS continues to excel at such a high level on a global scale," Glenn Geller, president of CBS Entertainment, said in a statement. "It is testimony to an amazing cast, led on and off the screen by the exceptional Mark Harmon, for skillfully bringing this universally appealing team of heroes to life; and to Gary Glasberg and his writers for crafting compelling stories that feature NCIS's signature blend of mystery, quirk, drama and comedy every single week."

NCIS airs Tuesdays, 8 p.m. on CBS.