Sean Murray biological father was an Admiral, Craig Harland Murray and his step-father, Donald P. Bellisario, the creator of NCIS, is a Navy Veteran.
McGee's Middle Name is revealed to be Farragut.
Admiral David Farragut (USN) was a civil war hero. He was the first person to hold the ranks of Rear Admiral, Vice Admiral, and Admiral of the U.S. Navy.
Christina Chang (NCIS Special Agent Valeri Page) is now on Rizzoli and Isles as Kiki which stars Sasha Alexander who portrayed Caitlin Todd on NCIS.