>> giles martin: yeah.going to play. >> wertheim: as you listen to all the recordings for this project, what impressions did you arrive at, in terms of their chemistry? >> giles martin: my impression of it is that paul and john kind of knew that they were growing apart, and "let it be" was almost like a marriage that's failing, and they want to go back on their date nights again. >> wertheim: compounding matters, george harrison-- restless in his role and bristling under paul mccartney's driving ambition-- leaves the band after a week. >> jackson: it's the most low- key walk-out that you've ever seen in your life. it's just-- "i'm leaving now." "what?" "i'm leaving the band now." and then he goes. there's no fight, there's no argument, there's no disagreement. >> wertheim: john was in love with yoko and, in his words, he was mistreating his body. the band was competing for his attention-- not always successfully. >> lennon: when i was younger, much younger than today, i never needed anybody's help in any wa