Songlines - Songlines - Episode 7

7/8. John Cavanagh puts the iconic Beatles song Let It Be under the spotlight. Inspired by a dream Paul McCartney had about his late mother, what went on in the recording studio, where dozens of versions of the song were cut? What provoked John Lennon's frustrations and outbursts towards McCartney, and what mystery still surrounds Aretha Franklin's recording of the song?