I've come across some pretty long spotify playlists for different tv-series.
I've put the usernames in brackets to give credit where it's due. But if you find yourself here and don't want your name (or your playlist) linked, just let me know in the comments and I'll remove either one.
Music from Treme (user: Serieall.fr)
I'm currently watching Treme and it's opening a whole new world of music to me.
Lost OST (user: Serieall.fr)
Going to re-watch Lost soon, eerie creepy music a plenty.
Skins Series 1-6 (user: Anna Belsey)
Never watched Skins, but you've got to admire the work that has been put in to get 576 (currently) tracks together. I found the 200 for The Wire already quite a task.
Breaking Bad (my own, but I copied several playlists from others into one)
Awesome tv series with some real gems of music (for instance Bang data - Bang data).
Sons of Anarchy (user: Michael Gegerfelt)
If you've got a tv-series playlist that I should check (and or share) just let me know!