There comes a time in every great rivalry when sworn enemies put their battle on hold to fend off other foes. In the case of “Billions,” that time is Season 4.
After years of ruthless one-upping and trying to take out each other’s sprawling web of influence, state attorney Chuck Rhoades (Paul Giamatti) and boundary-skirting venture capitalist Bobby Axelrod (Damian Lewis) have set aside their financial differences for the purposes of crushing a growing threat.