The producers convinced Disney to allow profanity to be included in the documentary, in contrast to most Disney+ original films. Sir Peter Jackson's reasoning behind it was, "The Beatles are scouse boys and they freely swear but not in an aggressive or sexual way."
The film makes use of the same footage-enhancing technologies Sir Peter Jackson first used in Pour les soldats tombés (2018) and later in his restoration of The Lord of the Rings trilogy.
Intended to be released theatrically in 2020 to coincide with the 50th anniversary of the release of Let It Be (1970) and its accompanying album. The global COVID-19 pandemic forced the release date to be pushed into 2021. The film was subsequently repurposed as a three-part mini-series and released on Disney+.
Throughout the documentary, Paul can be heard addressing Glyn Johns as "Glynis." This is most likely a joke in reference to the fact that Glyn's name sounds remarkably similar to the actress Glynis Johns, who is of no relation to him.
Mal Evans, the band's road manager and personal assistant, was shot dead by Los Angeles police in 1976. It is believed to have been a case of "suicide by cop." Having become depressed at his collapsed marriage and carrying a BB gun, Evans had locked himself in a room, and was confronted in his home by officers, (who had been called by his worried girlfriend) who opened fire when he refused to put the gun down.