A provocative and previously unannounced documentary from comedian Nathan Fielder and director Lance Oppenheim that features an intimate look at Theranos founder Elizabeth Holmes and her family premieres in a secrecy-shrouded screening at the Telluride Film Festival in Colorado. ↧ Nathan Fielder’s surprise Elizabeth Holmes documentary debuts at ... Fielder spoke at the film festival about how the documentary came together, saying even he didn’t understand why the Theranos founder opened up her life to him: “That messed with my head.”