This article contains spoilers for the series finale of “Billions.” When the propulsive financial drama “Billions” premiered in 2016, its core premise centered on the vicious blood feud between U.S Atty. The complicated plot by Rhoades and Axelrod to take down Prince was flavored by the head-spinning double-and triple-crosses that have made “Billions” one of Showtime’s biggest hits. Executive producers …
