With a trio of films in the mid-1950s - A Streetcar Named Desire, On The Waterfront and The Wild One - Marlon Brando laid claim to being the greatest actor of his time. He was also a cultural icon before that phrase was cheap: a magazine cover fleetingly seen in this film asks, "Could There Have Been Elvis Without Brando?".
Yet his career as a whole was a chain of disappointments, studded with professional failures and personal tragedy.
Even our memories of its great later high point, the revelatory title-role performance in The Godfather, are sadly overshadowed by his legendary obesity and the fates of two of his 15 (or so) children: son Christian shot and killed his sister Cheyenne's boyfriend in 1990; Cheyenne committed suicide in 1995.
Writer-director Riley, who made Fire in Babylon, the exuberant ode to the era when the West Indies owned world cricket, studiously eschews superficial gossip in this deeply impressive documentary, which adopts an impressionistic, poetic style that is entrancing and deeply revealing.