John Lennon’s one and, sadly, only full-length post-Beatles concert, a charity event in 1972 at Madison Square Garden, can now be experienced in IMAX. That alone makes Kevin Macdonald’s latest

Sticking to a rigorous exfoliation of a matter of months, Kevin Macdonald's double profile reveals an activist pair informed by a squall of ominous TV news.

The project marks a chance to reassess, yet again, one of the most consequential and confounding artists, in any medium, of the 20th century.