[s10e23] The Guardian Guide

: On the ship, they meet Captain Harmon Rabb Jr., who is serving as the ship’s Executive Officer (XO). This introduction bridges the NCIS and JAG universes, providing a nostalgic link for long-time fans. Key Character Arcs

: The duo operates in a high-pressure environment aboard the USS Allegiance, focusing on identifying "signals" and "expert" threats within the crew. [S10E23] The Guardian

: Although Sarah "Mac" MacKenzie (Catherine Bell) does not appear until the following episode ("False Flag"), "The Guardian" sets the stage for her reunion with Harm, revealing that the two have been apart for many years. Thematic Analysis : On the ship, they meet Captain Harmon Rabb Jr