The howlin' wolf story: the secret history of rock & roll (2003)

Arguably second only to Muddy Waters among the Mississippi Delta singers who traveled north and pioneered urban electric blues (their supposed rivalry is the subject of one of this DVD's bonus features), Wolf was a big, imposing man with an inimitable, booming voice and a lasting influence on generations of rock & rollers--all of which comes across in the 90-minute film.