On February 23rd in 1965 The Beatles were in The Bahamas for the first day of filming for the movie Help!

The film starred The Beatles - John Lennon, Paul McCartney, George Harrison and Ringo Starr and the soundtrack was released as an album, also called Help!

About the movie: Ringo finds himself the human sacrifice target of a cult and the band must try to protect him from it.

After the success of their first movie, A Hard Day's Night, director Richard Lester had a bigger budget for Help!. The film was shot in colour (unlike the first) and visited several locations. 

According to The Beatles Anthology, George became interested in Indian music during a filming sequence in a restaurant during their Bahamas filming. This played a role in later songs such as "Norweigan Wood", which would later be the remade into a reggae version for the very popular "Darker Shade of Black" by Jackie Mittoo. 

From Wikipedia:

The Beatles did not particularly enjoy the filming of the movie, nor were they pleased with the end product. In 1970, John Lennon said they felt like extras in their own movie. "The movie was out of our control. With A Hard Day's Night, we had a lot of input, and it was semi-realistic. But with Help!, Dick Lester didn't tell us what it was all about. —John Lennon on filming Help!

Ten years later Lennon was more charitable:[2] I realize, looking back, how advanced it was. It was a precursor to the Batman "Pow! Wow!" on TV--that kind of stuff. But [Lester] never explained it to us. Partly, maybe, because we hadn't spent a lot of time together between A Hard Day's Night and Help!, and partly because we were smoking marijuana for breakfast during that period. Nobody could communicate with us, it was all glazed eyes and giggling all the time. In our own world. It's like doing nothing most of the time, but still having to rise at 7 am, so we became bored.

See Also:
Help! the movie
Help! the album