How many episodes are in the 2014 American documentary about a band who's frontman is Dave Grohl?
Foo Fighters: Sonic Highways: Sonic Highways is a 2014 American documentary miniseries directed by Dave Grohl and written by Mark Monroe. Dave Grohl:  He is the former drummer of the grunge band Nirvana and the frontman and founder of the rock band Foo Fighters, of which he is the lead vocalist, rhythm and lead guitarist, and primary songwriter.
i don't know