LAST KNOWN WHEREABOUTS: Little Fockers (2010), alias Robert De Niro.
HISTORY: Though retired, Byrnes still boasts an agency operative's distrustful eye, need to control every situation, and ability to arrange occasional surreptitious DNA tests.
STATUS: DARK. Awaiting activation of third sequel nuclear option.
THREAT ASSESSMENT: He looks like an aging Jake La Motta. Would you mess with him?