Alex Winter's dense but accessible Frank Zappa doc doesn't capture all of who Zappa was so much as it conveys why that would be impossible. Sooner or later, any commercially viable documentary about ...

Not jazz, not rock ’n’ roll, not the blues and not pop, 28 years after his death, Frank Zappa remains a singular and surreally subversive artist, impossible to categorise. “Well, what the hell is it?” ...