Deeks says the French Intelligence Agency should have learned their lesson after their last encounter when Kensi kicked one of them in the groin. That occurred in episode 2.9 - Absolution (2010).
This is the only episode of NCIS: Los Angeles (2009) not to include the theme during the opening titles. Instead, the title, along with the "Created by Shane Brennan" slate, appear as a superimposed title at the beginning of the episode.