LennoNYC (2010)

LENNONYC is a 2010 documentary film written and directed by Michael Epstein about the life of John Lennon in New York City, after the breakup of the Beatles. The film premiered at the New York Film Festival and was shown at a free public screening in Central Park on October 9, which would have been Lennon's 70th birthday. It first aired on the PBS series American Masters on November 22.

More at Wikipedia.