
The film discusses the traits and originators of some of metal's many subgenres, including the New Wave of British Heavy Metal, power metal, Nu metal, glam metal, thrash metal, black metal, and death metal. Dunn uses a family-tree-type flowchart to document some of the most popular metal subgenres. The film also explores various aspects of heavy metal culture.
Director: Sam Dunn

Sam Dunn
Self

Chris Adler
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Tom Araya
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Gavin Baddeley
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Blasphemer
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Randy Blythe
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Alice Cooper
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Pamela Des Barres
Self

Bruce Dickinson
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Ronnie James Dio
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