In season four former U.S. Naval Intelligence Officer turned criminal mastermind Raymond "Red" Reddington (James Spader) has become the FBI's Most Wanted Fugitive. For decades, he evaded capture until he voluntarily surrenders to FBI Assistant Director Harold Cooper (Harry Lennix). He claims he has in his possession a "blacklist" of the world's most dangerous criminals he has been associated with during his nefarious career and is willing to cooperate with the FBI to bring them down under two conditions: immunity from prosecution, and that he insists on working exclusively with Elizabeth "Liz" Keen (Megan Boone), a newly assigned rookie profiler with the FBI.