This television episode plays:
October 26, 1959
This song plays over the radio in the car Walt starts up in the opening scene. Walt later sing the song while testing out his gun setup. The woman this song is about is named "Feleena" which is also a connection to the title of this episode, "Felina". The change in spelling was because "Felina" is an anagram of "finale" and it's letters can also be broken up into periodic table element symbols: Fe (iron), Le (lithium), and Na (sodium).