Castiel finally understands what's behind all of those love songs after Metatron provides him with a few millennia worth of pop culture. Castiel proceeds to make the fluffiest mixtape ever for his one true love, mustering up the courage to put it in the Impala's cassette deck (ha!). But with Metatron's schemes hanging overhead, what will his admission mean?

Update: I now have a tumblr and I don't know how to use it!