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Two South Africans hunt for Rodriguez, a Detroit singer they think is dead.

The pianist at eighty, playing and talking, filmed across Europe and America.

Bob Dylan on his 1965 tour of England, with the cue-card video for "Subterranean Homesick Blues".

Philippe Petit walks a wire between the Twin Towers in 1974, told as a heist.

Eight hours on Simpson, race and Los Angeles; the documentary that won an Oscar as a film.

Alexei Navalny phones his own poisoner; the documentary made before his death.

Helen Keller at seventy-four, filmed at home and narrated by Katharine Cornell.

The Nobel laureate at his hospital in Lambarene, filmed in Gabon in his eighties.