Do 당신 think T.V shows play a role in a song's popularity?

Depends on the song; I know for a fact that I wouldn't have heard of some bands I like if not for Teen Wolf, Bad Girls Club, and various anime.

I don't really watch 텔레비전 that much. However, I really got into Cage the 코끼리 의해 the first Borderland's opening sequence. (It played the single 'Ain't No Rest for the Wicked')

Yeah, I think it can reach a broader audience if it's a good TV show and the constant repetition might actually help in making the song 더 많이 popular. As they say, with some songs the 더 많이 당신 hear, the 더 많이 당신 will like them.