The classically-trained British actor plays a ruthless hedge-fund manager on Showtime's 'Billions,' which recently ended its fourth season. Lewis describes his character as "the embodiment of the American dream." He also starred in the series 'Homeland' as Nicholas Brody, a Marine sergeant who converts to Islam in captivity. Also, Soraya Nadia McDonald reviews 'When They See Us,' Ava DuVernay's devastating new miniseries about the Central Park Five.