In a no-brainer decision, Showtime is bringing back Billions for a sixth season that will feature more of Corey Stoll, the season five guest star who has been upped to series regular. Though it has been interrupted by the pandemic, the fifth season of Billions has so far found Bobby Axelrod (Damian Lewis) and Chuck Rhoades (Paul Giamatti) reigniting their vicious rivalry while facing new enemies. Social impact pioneer Mike Prince (Stoll) has been posing a true threat to Axe’s dominance, and Chuck has been feuding with a formidable district attorney (Roma Maffia). Taylor Mason (Asia Kate Dillon) …