An unauthorized documentary using live performances and album cuts such as "Kashmir" and "Houses of the Holy", this DVD includes rare footage, photos and interviews on the making of Led Zeppelin's 1975 double album 'Physical Graffiti'. Narrated by the BBC's Nicky Horne, it has balanced commentary from authors Dave Lewis, Nigel Williamson, Neil Daniels, Malcolm Dome and insight from studio engineer Ron Nevison, with background into the development of the album by Chris Dreja, Maggie Bell, and guitarist Rikky Rooksby. Extras include an interactive quiz, contributor biographies, plus extended interview with Nevison.