Channels with Peter Kafka

'Billions' producer Brian Koppelman

Writer and filmmaker Brian Koppelman talks with Recode's Peter Kafka about co-creating the hit Showtime series "Billions." Koppelman has made a habit of engaging with the show's fans online, but says that when he's writing new episodes, he has to completely unplug from the rest of the world and not think about how Twitter will react to the latest twists…