Callen and Sam work with Captain Harmon Rabb, the former JAG, who is now the XO on the USS Allegiance to stop ISIS sympathizers from attacking U.S. aircraft carriers.
Did You Know?
Harmon Rabb has held the rank of Captain since April 2005 (14 years). He promoted from Lieutenant to Lt. Commander in March of 1996, from Lt. Commander to Commander in November of 1999 (3 years), and from Commander to Captain in April 2005 (<6 years).
Somewhere along the line he left the JAG corps (where he was still assigned as of the series finale) and returned to being a line officer, so he did not follow in the footsteps of Admiral Chegwidden to become the Judge Advocate General as had been theorized in the former series finale. See more