Judgement, Part II: Gibbs recognizes the Russian woman that Jenny was suppose to assassinate 10 years earlier. Gibbs takes off. And when Vance orders McGee to call him back, McGee only dials five numbers and yet Gibbs' cell phone, which was left on his desk, rings anyway.
Last Man Standing: At the end of the episode Agent Lee gets a text message asking if anyone suspects. She goes into the elevator and types "NO". She then closes her cellphone without pressing send.