“505” is one of the songs that marks a turning point in Alex Turner’s songwriting, as he discovers new emotional depths.
The organ chords are the same as were used in 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.