Broadway veteran Peter Hermann will guest star on the third episode of CBS' Blue Bloods, according to EW.com.

He will play lawyer Jack Boyle, the ex-husband of Erin, played by Bridget Moynahan.

Hermann last appeared on Broadway in War Horse, and his other stage credits include Talk Radio and Judgment at Nuremberg. His TV credits include A Gifted Man, the HBO film Too Big To Fail and a recurring role on Law & Order: SVU opposite his wife, Mariska Hargitay.