

Plot
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.
Cast

Sam Dunn
Self

Chris Adler
Self

Tom Araya
Self
Gavin Baddeley
Self
Blasphemer
Self

Randy Blythe
Self

Alice Cooper
Self

Pamela Des Barres
Self

Bruce Dickinson
Self

Ronnie James Dio
Self

Malcolm Dome
Self

George Fisher
Self
Crew
Jessica Joy Wise
Director
Scot McFadyen
Producer
Scot McFadyen
Writer
Sam Dunn
Producer
Jessica Joy Wise
Writer
Scot McFadyen
Director
Sam Dunn
Writer
Sam Dunn
Director
Brendan Steacy
Director of Photography
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