Supernatural: 20 Greatest Music Moments

2. "Nice To Be With You" By Gallery (8.23, "Sacrifice")

In the final episode of Season 8, Castiel is performing Metatron's "angel trials," the second of which requires him to retrieve the bow of a Cupid. Cas and Dan stake out a bar and wait for the assigned angel to appear. Other than themselves, bartender Dwight, and a regular named Rod, the bar is empty. A delivery woman enters, and Dwight helps her unload a crate of beer. Dean and Cas perk up, certain that these two will be struck by Cupid's arrows. Instead, she just pats both Dwight and Rod on the shoulder and leaves. "Nice To Be With You" begins to play on the jukebox. Suddenly, Dwight and Rod lock eyes. Rod is clearly smitten already. "How 'bout the next one's on me?" says Dwight, smiling. Dean is flabbergasted, and it's pretty funny.

1. "Carry On Wayward Son" By Kansas (Seasons 1-8, Finales)

"Carry On Wayward Son" is one of those songs that everybody has heard and offers a chorus that everybody can sing along with. But to listen to the whole song with the ears of a Supernatural fan? It's pretty darn fitting for the brothers Winchester. In fact, it is so fitting that it has been used to back the introduction to every season finale so far. By this point, if the Season 9 finale does not feature "Carry On Wayward Son," there is every chance that Tumblr will, in fact, explode.

As dramatic as that may sound, "Carry On Wayward Son" has become an integral part of the show's lore, marking the beginning of the end of each season. After all, as much as Supernatural features angels and demons and ghosts, it is truly a show about the relationship between two brothers and their attempts to somehow survive in a world determined to kill them (several times over), and "Carry On Wayward Son" is just about the most appropriate possible song for Sam and Dean Winchester.

Also, it's super catchy.