Per the CBS sitcom "The Hesitation Ramification (2014)", actress Penny filmed a part for this episode where she flirted with Mark Harmon, but the scene was cut in the final edit of the show.
This episode is the first time Emily Wickersham appears as a member of the cast, not as a guest star.
When Ducky says "cherchez la femme", he is telling Gibbs to "look for the woman".
Patuxent River Naval Air Station is real base in Southern Maryland