In the world of motorsports, the Indianapolis 500 has long been considered the only race. In May 1977, Janet Guthrie — the first woman to attempt Indy — earned herself a spot in the prestigious field of 33. A year later, overcoming impossible odds, Guthrie cobbled together her own team for a stunning success. Yet just when her career should have rocketed forward, it suddenly, inexplicably stalled.

• Documentary