Stephen Michael Kunken is an American actor. He is known for the roles of Ari Spyros on Showtime's Billions and Commander Putnam on Hulu's The Handmaid's Tale. His film work includes work with Martin Scorsese, Steven Spielberg, Woody Allen, Ang Lee, Barry Levinson, and others. Kunken is most readily known for his Tony award nomination for playing Andy Fastow in the Broadway play Enron, for which he received a Tony Award nomination for Featured Actor in a Play. Other Broadway credits include Frost/Nixon and Rock 'n' Roll'.