Ep 7: The album art for "Two Virgins" is shown, which features a fully naked John Lennon and Yoko Ono. Shown at around 41 mins in.

All four band members use profanity occasionally. Often minor words damn, shit, dick, ass etc. But a few f words here and there.

The Beatles are seen constantly smoking throughout the series. As all four were heavy smokers.

The Beatles talk about their use of drugs from Marijuana to LSD and John with Heroin later on. Mostly Episodes 5-9.