Looking for a song...

[Pothole]

and by the looks of it so is half the world (may be slight exaggeration)

It's on a trailer for Season 2 of The Walking Dead, sounds like Jonny Cash, and has the lyrics

When the wolves are scratching at your door
When they take your soul and come back for more
When the parts don't total up the sum
I'll be with you till the morning comes
I'm staying till the morning comes.

Clip here: http://www.istockphoto.com/stock-audio-8825495-til...

Anyone?

[Carfolio]

There's an app for that. Shazam or TrackID. Possibly more.

[Pothole]

comes up blank. I think it's unreleased. Also I think the Istock voiceover is doing what it's no doubt designed to do...

[Carfolio]

Pothole said:

comes up blank. I think it's unreleased. Also I think the Istock voiceover is doing what it's no doubt designed to do...

And from the series itself? IMDB soundtrack listings no help?

[Lotus 50]

I'm pretty certain you're right - it's Johnny Cash. Odd that the song doesn't come up in searching the inter-web or iTunes, as one of the previous posters has said perhaps it's not been released (yet)...

[Pothole]

Carfolio said:

Pothole said:

comes up blank. I think it's unreleased. Also I think the Istock voiceover is doing what it's no doubt designed to do...

And from the series itself? IMDB soundtrack listings no help?

it's only on a trailer, said trailer only on Virgin, apparently. Neither IMDB nor the rest of the internet any help, no.