Arctic Monkeys is an indie rock band formed in Sheffield, South Yorkshire, England in 2002 after meeting at Stocksbridge High School. The band consists of Alex Turner (vocals, guitar, piano), Jamie Cook (guitar), Nick O'Malley (backing vocals, bass) and Matt Helders (drums, vocals). Founding bassist Andy Nicholson left in 2006.
The band has released seven studio albums: Whatever People Say I Am, That's What I'm Not (2006), Favourite Worst Nightmare (2007)
“505” is one of the songs that marks a turning point in Alex Turner’s songwriting, as he discovers new emotional depths.
The organ sample is taken directly from Ennio Morricone’s soundtrack for the iconic Western, The Good, the Bad and the Ugly, where Angel Eyes enters before the final standoff.
The title could be an allusion to “Flight 505” by The Rolling Stones, with both songs sharing the theme of going somewhere to recapture a feeling or moment… or a person.
"505" is a term for something that is killing you and keeping you alive at the same time (often used for a loved person that might be bad for you).