"It all started with the idea of recording in different studios all over the country," says Grohl in the voiceover. "Doing something to make it new. You can tie all of these people and places together with these 'sonic highways'. This is a musical map of America."
Each of the eight episodes shows Foo Fighters traveling to a different US city to record their album. In each locale, they record a track. There's no official release date as of now, but you can check out the teaser to the right.