Chiwetel Ejiofor gives a performance of incomparable heroism and presence as Northup; Lupita Nyong» o is passionate and defiant in the role of his fellow prisoner Patsey, and Michael Fassbender is
the sadistic slavemaster Epps, whose habitual sexual abuse and angry self - hate is revealed to be a pathological and under - reported part of the system; a system, which in the words of one character, enables the abuser's violence to «trample his guilty sensation».