5 Must-See Music Docs At SXSW

Sidemen: Long Road to Glory: Bonnie Raitt and Joe Perry pay tribute to a trio of legendary Howlin’ Wolf and Muddy Waters’ sidemen— piano player Pinetop Perkins, drummer Willie “Big Eyes” Smith, and guitarist Hubert Sumlin— in a film that captures the bluesmen in their last performances before they all, eerily, died in 2011. (March 11)