A Hard Day's Night could have been an absolute disaster. The Beatles were at the height of their popularity and United Artists could have easily made a quick cash-in no better than the crap Elvis Presley was churning out at the time. Thankfully, Alun Owen wrote a very clever screenplay after spending time with the band and getting a firm grip on their individual personalities.
The simple plot revolves around the band traveling from Liverpool to London for a TV show. Along the way, they dodge a small army of crazed fans. George Harrison met his future wife Pattie Boyd on the set, and Hollywood soon knocked off the entire thing and created the Monkees.