FX has released two featurettes for Season 5 of Sons of Anarchy, along with a promo for next week's episode "Authority Vested", airing Tuesday, September 18 at 10 PM ET. The behind-the-scenes videos explore the music used in the series, the theme song "This Life," and the band who performs it, The Forest Rangers. Take a look at how these musical pieces help bring new meaning to the show, along with a sneak peek at the upcoming episode.