Icarus (2017)

An amateur cyclist's experiment with performance-enhancing drugs becomes an increasingly dangerous relationship with anti-doping scientist Grigory Rodchenkov. Bryan Fogel lets the scale of the story change as his access changes, which gives the film the feeling of an investigation overtaking its original plan. Choose it for that escalation from a personal test to a geopolitical scandal. Rodchenkov is a central participant and witness, rather than a disinterested narrator.