The agent has worked 'undercover' in several countries.
He went 'undercover' as a drug dealer.
an 'undercover' investigation
(..) You did it, fuzzy. You busted 'em. It's time to come home. I'm not sure if I can. I've been undercover so long, I've forgotten who I am. I have seen terrible things. I haven't known the touch of a woman in many moons. All right. (..)2013 TvShow: Brooklyn Nine-Nine Title: Pilot Season: 1 Episode 1