Gibbs and Marcie realize that the killer they've been tracking may be onto them on the season finale of NCIS. "Rule 91" is the 16th episode of the show's 18th season.
Gibbs and Ducky recall the case that brought them together on NCIS' 400th episode. "Everything Starts Somewhere" is the second episode of the show's 18th season
Vance: You're the boss, boss. Although when I asked to tag along I thought this was going to be more like, you know, Butch and Sundance. You're the quick-draw, I'm the brains. Kind of co-equals. Gibbs: Yeah, we're not. Vance: So what, I'm Robin to your Batman?
