Endgame (2009) was also the title of Season 7 Episode 7 of the original NCIS (2003), an episode which concluded a cross-over plot started on NCIS: Los Angeles (2009).
The license plate on Vaziri's car at the end of this episode is the same as the one on the vehicle driven by the Israelis in 3.24 "Sans Voir Part II" read aloud by Eric and Deeks after the warehouse explosion.