This is the one hour documentary made by Film Four in 2000 which was originally screened as part of an Argento season. On the plus side, there's plentiful interview footage with Argento, who goes into why he makes the films that he does (in his own Italian too, so none of his broken English), and other assorted and varied interviews with the likes of Michael Brandon, Luigi Cozzi, Alan Jones, Daria Nicolodi (briefly) and even Asia Argento. These interviews are fresh and entertaining, and even Tom Savini gets to talk at length about his various effects shots.
However, I think they should have studied and perhaps reviewed Argento's movies a little more closely. Most of them are mentioned but not examined and some aren't even featured - THE STENDHAL SYNDROME for one. The documentary promised exclusive footage from the set of SLEEPLESS, which we get, but again it isn't even mentioned in Mark Kermode's voice-over. Nonetheless this is a watchable little item for fans of the genre, and professionally done.