At the end, when Deeks is saying goodnight to everyone (ala "The Waltons"), he looks at Nell and says "Goodnight, Nay-Nay". Nay-Nay is the real-life nickname of Renee Felice Smith, the actress who portrays Nell Jones.
Don Franklin (Capt Beck) was in 3 episodes of NCIS as character FBI Agent Ron Sacks.