Birkhoff is a computer genius recruited at the same time as Nikita into Division. As a college student, he was caught hacking into the Pentagon's system.
Michael: OK, so where is this place?
Birkhoff: The quarters for the Red Circle Triad in New York. Not much going on right now but at night it turns into a pretty happening spot. Lady Gaga was there last Friday.
Percy: Well you did have a prolonged interaction with Nikita directly, following her reappearance.
Birkhoff: If by interaction you mean kidnap and torture. Dude, she pistol-whipped my face. What are we even talking about here?