Before getting into "The Limitless Sh*t," Episode 7 of 'Billions' Season 5, cocreators Brian Koppelman and David Levien discuss the concept of high-end mental-performance-enhancing drugs; the difficult editing required to pivot into a midseason finale; crew superstars, including the line producer, key grip, and gaffer; obscure references; guest cast; and more (0:05). They next speak with actor-director David Costabile, who plays Mike Wagner, about directing as well as acting in Episode 7, figuring out who Wagner is as a character, old-school NYSE traders, and more (31:05)