Some would argue that there's no rock music without an electric guitar. To a degree the seventh installment in the ten part series of documentaries, "The History of Rock & Roll" states just that as it offers an interesting, if predictable examination of a few of the more revered rock guitarists. The episode tracks the electric guitar from it's beginnings in the 1930's to its use in contemporary rock music. Jimi Hendrix, Pete Townsend, Eric Clapton, Jimmy Page, and Eddie Van Halen may top the list of finest guitar players, but for an installment in the history of rock and roll there are a few too many unrepresented contributors to the instrument. On the other hand it is absolutely charming to hear Townsend gush over Hendrix's out of this world talent.