"Semper fortis" is Latin for "always strong", and is the unofficial motto of the United States Navy.
Burt, the name of Abby's beau, is also the name of Abby's farting stuffed hippo
When DiNozzo jokingly accuses Bishop of cannibalizing her never-seen husband with fava beans and a Chianti, he is referring to Hannibal Lecter's confession in The Silence of the Lambs (1991).
Ray Mabus: United States Secretary of the Navy Ray Mabus makes his second cameo appearance on NCIS (2003) appearing as "Ray" who greets Gibbs in the diner. (Previously appeared in Child's Play (2009)).