Screening at Sundance: David Greaves’s ‘Once Upon A Time In Harlem’

William Greaves, the late documentary filmmaker who died in 2014, drew from a multitude of inspirations in his day, from boxer Muhammad Ali in sports chronicle The Fighter (1974) to Heisenberg’s Uncertainty Principle in the experimental meta-movie Symbiopsychotaxiplasm (1968). However, perhaps his most vital work was one he never quite decided how to finish, despite filming it in 1972. Now, after more than 50 years, his son David Greaves brings his father’s greatest feat to stunning completion...