Steve Earl, who plays Walton and performs the season 5 theme, is a professional musician but also, like his character, had trouble with heroin. https://en.wiki

Steve Earl, who plays Walton and performs the season 5 theme, is a professional musician but also, like his character, had trouble with heroin. https://en.wikipedia.org/wiki/Steve_Earle https://en.wikipedia.org/wiki/Steve_Earle