Peter Hermann

Bridget Moynahan’s character is not going to like the sharp attorney she’ll have to face in court during this season of CBS’ Blue Bloods.

That’s because the charismatic lawyer that Erin goes toe-to-toe with is her ex-husband Jack Boyle!

EW has learned exclusively that Peter Hermann will play Erin’s ex in the third episode of the CBS drama, which returns Sept. 28. Long absent from New York, Jack’s surprise return stirs up unresolved issues for Erin, their daughter Nicky (Sami Gayle) and the rest of the Reagan family.

Hermann last appeared on CBS as Harrison Curtis on A Gifted Man. He also co-starred in the HBO film Too Big To Fail and recurred for years on Law & Order: SVU.