Hedge fund scheming and political face-offs take centre stage tonight as Showtimes' fast-paced drama returns with it's fourth season which debuts on Sky Atlantic tonight. An unprecedented partnership is forged in the wake of last season's finale with Damian Lewis' hedge-fund billionaire, Bobby Axelrod, and Paul Giamatti's ruthless attorney, Chuck Rhoades, joining forces. Asia Kate Dillon becomes one of Bobby's new adversaries reprising her role as former AxeCapital player Taylor Mason, while John Malkovich steps up his role in the show as he returns as his powerful Russian oligarch, Grigor Andolov. With last season's finale seeing the feud between Bobby and Chuck come to an uneasy ceasefire, we pick up tonight with Chuck - now no longer a US Attorney - struggling to retain what power he once had. Bobby forces Axe to close ranks as he goes head-to-head with Taylor, intent on destroying her new company. But when Taylor takes extreme measures to keep her business afloat and threatens both Bobby and Chuck's livelihoods, can their fragile new partnership stand up to the test? Billions - Wednesday 9:00pm on Sky Atlantic.