This episode makes Michael Weatherly the third actor to appear in all three NCIS shows. The first two were Pauley Perrette and Rocky Carroll.
Produced at the end of Season 6 to avoid scheduling conflicts. Chris O'Donnell previously stated that Michael Weatherly wanted and was wanted to be on the show for a long time and the fact that NCIS and NCIS: Los Angeles are produced simultaneously was always an issue.
After being pointed toward the tunnel in the LA Field Office, DiNozzo (Michael Weatherly) comments "What's a Batcave without a tunnel?" This may be a nod to the fact that Chris O'Donnell played Dick Grayson/ Robin in Batman Forever (1995) and Batman and Robin (1997).