The episode begins with Linkin Park's "When They Come For Me," from their A Thousand Suns album. Linkin Park provides great driving music. Nothing's better on the way home from work. I've listened to a lot of Linkin Park while conceptualizing and writing The Ruffians, and have plans for at least one more of their songs in a future episode.
The main reoccurring "theme" of the episode is Christopher Drake's "A Death in the Family," from his score to Batman: Under the Hood. Drake is someone I've only recently discovered, from his excellent work on the DC animated movies. I would especially recommend his Superman/Batman: Public Enemies score, as it was the first score of his I heard, purchased, and then listened to over and over again. His themes for for the titular heroes are top-notch and give hope to a post-Williams theme for Superman.
The music that accompanies Charlie as he wistfully looks at pictures of his girlfriend is Florence + The Machine's "Addicted to Love." I heard this song for the first time on So You Think You Can Dance and haven't stopped listening to it ever since. It is not to be confused with the Robert Palmer song of the same name.
Thomas Newman's "Dead Already" plays under the scene in the kitchen. It's a selection from his score to Jarhead. I listen to a lot of Thomas Newman when I write. He's one composer that deserves to be a household name, but somehow isn't. Everyone knows his music: Road to Perdition, Wall-E, Finding Nemo, and of course, American Beauty. If you haven't taken the time to sit down and listen to some of his work, rectify that now.
Playing over the closing credits is Gangstagrass' "I'm Gonna Lay You Down." This duo may be the single most unique band/group/ensemble/duo I have ever heard. Their bluegrass rap is something to behold. When started watching Justified, I had to find out who was responsible for its opening credits song. It's these guys. Check 'em out. You won't regret it.