'Billions' began with a very simple premise: Bobby “Axe” Axelrod (Damien Lewis) is a billionaire financial whiz who runs a hedge fund called Axe Capital and Chuck Rhoades (Paul Giamatti) is the U.S. attorney out to put him away. But there’s much much more to it than that. 'Billions' may not be the best show on TV, but it’s certainly the most entertaining.