Exclusive

NCIS Exclusive: A JAG Favorite to Return in This Season's 'Nail-Biter' of a Finale

NCIS Season 10 SpoilersAll hands on deck: A beloved JAG officer is poised to show up just when NCIS needs him most.

John M. Jackson will reprise his role of Judge Advocate General A.J. Chegwidden in the JAG spin-off’s 10th season finale, which finds a federal witch hunt threatening the future of Gibbs’ gang.

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“We needed a lawyer, a really good lawyer, to assist Gibbs and the team in the finale,” NCIS executive producer Gary Glasberg tells TVLine exclusively.

Enter Chegwidden, now retired from the Navy, who will step away from his powerful D.C. law firm to help Gibbs & Co. in the episode. Glasberg calls the outing a “nail-biter which will hopefully leave fans stunned all summer long.”

Fans of JAG will remember Chegwidden as Mac and Harm’s boss – and sometime father figure – whose gruff demeanor belied a deep devotion to his team. He was in charge during the Season 8 episodes that introduced Mark Harmon’s Gibbs and served as NCIS‘ planted pilot.

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Since leaving JAG in 2004, Jackson has guest-starred on series including Bones, Private Practice, CSI, Castle and Perception.

The retired Navy big shot is just one of the surprise guest-stars who’ll show up during the eventful season-ender, which airs Tuesday, May 14 (8/7c).

“Our NCIS team may never be the same again,” Glasberg adds.