When does Foo Fighters: Sonic Highways return?

Sonic Highways is a 2014 American documentary miniseries directed by Dave Grohl and written by Mark Monroe. The series eight episodes show the Foo Fighters traveling to eight legendary studios in eight cities across the United States of America to write and record their album. The cities visited were Chicago, Washington, D.C., Nashville, Austin, Los Angeles, New Orleans, Seattle and New York. Each episode features interviews with artists who recorded at the respective studios.