1 (also known as 1: Life On The Limit) is a 2013 documentary film directed by Paul Crowder and narrated by Michael Fassbender. The film traces the history of Formula One auto racing from its early years, in which some seasons had multiple fatalities, to the 1994 death of Ayrton Senna, the sport's most recent death at the time of production. Extensive and often rare archival footage is used throughout.