In the Song of Ice and Fire series of books and HBO’s TV adaptation of them, Game of Thrones, lots of growly-voiced men drink heavily, often while talking about the macabre. On THE NATIONAL'S albums, a growly-voiced man sings about drinking heavily and presents us with humane, yet macabre, lyrics. It seems like a natural fit, then, for the band to do a version of an in-text song called “The Rains of Castamere” for the soundtrack to the show.