What was the song at the end of The Walking Dead "Nebraska" episode?

For those of you desperate to know, it was The Regulator by Clutch. If there is something that I really like about good shows like The Walking Dead is the great music they bring along! This time it was Clutch, a band that I used to love in the nineties, but that, for some reason, I lost track of them in last decade. They have evolved towards towards a more blues and hard rock style, leaving aside the heavy metal/hardcore punk flavor of their first albums.
Here is a link to The Regulator in case you want to hear the whole song:

And another one of a live performance:

Enjoy!