Helgenberger has joined the Fox pilot Behind Enemy Lines, according to TV Line. The series is based on the 2001 Luke Wilson film of the same name and follows a group of soldiers who get trapped on the wrong side of the fighting lines and the military officers who are tasked with bringing them back unharmed. Fox describes it as a "military soap thriller," so uhhh, okay.
You won't see Helgenberger behind enemy lines (yet) as she'll be playing Navy Admiral Bobbie Decker, a tough no-nonsense who does everything in her power to keep her soldiers safe. B.J. Britt was previously cast in the pilot.