Roy Petty

Roy Petty introduces himself as an easygoing FBI agent named Roy, striking up a friendly rapport with the Byrdes and Ruth Langmore alike. Behind the affable small talk is a patient, watchful federal investigator working the Ozarks money-laundering operation from the inside, willing to let relationships deepen before he calls in what he needs.

Harner plays him as genuinely likable, which is the trick: you warm to Roy the same way his targets do, so his shifts from warmth to calculation land as small, cold surprises rather than twists. The performance never tips its hand, keeping you guessing exactly how much of the friendliness is real.