The November 25 episode of NCIS is titled "Dagger." In this preview, viewers are teased about who is behind the biggest security breach in team history.
Added:

NCIS Season 6 Episode 9 Quotes

Vance: So, what are you gonna tell her? (Gibbs turns to face him) Lee a hero or a villain?
Gibbs: Both.

Tony: (on the phone) Hey Probie, what I am looking at?
Vance: A career in the fast food industry.
Tony: Director Vance. How are you, sir?