It didn't hurt that the excellent supporting cast, which includes Maggie Siff, Asia Kate Dillon, and the great David Costabile as Mike 'Wags' Wagner, all stuck around. There's no replacing Bobby Axelrod, but the show successfully found a new balance with Prince, who has different motives for what he does than Axe. Stoll plays Mike Prince, a brilliant investor with altruistic ideals that he doesn't let get in the way of his ruthless quest for profit. Season 6 was something of a reset for the show, with Corey Stoll taking over the role of a crooked billionaire foil to crusading attorney Chuck Rhoades ( Paul Giamatti) after Damian Lewis departed the role of Bobby Axelrod at the end of Season 5. Paul Giamatti, Billions Jeff Neumann/SHOWTIMEīillions, Showtime's slick finance drama, recently concluded its sixth season and has been renewed for a seventh, which will presumably debut in 2023.