Gibbs' rule no. 9: Never go anywhere without a knife.
In this episode, T.J. Thyne plays a couch potato aficionado of criminal procedurals, at one point saying "That's not how they do it on CSI: Crime Scene Investigation (2000)"; he'll later play a crime-solving scientist in Bones (2005).
The episode's title, "One Shot, One Kill", is a reference to a 1995 documentary about American Marines CSI: Crime Scene Investigation (2000).
In previous episode Gibbs asks Ducky who he would have pose as a Marine and Ducky replies, "you".