This 13-minute retrospective documentary offers some pretty solid and illuminating information on the making of Martin Scorsese's debut theatrical feature "Who's That Knocking on My Door." Directorial assistant Mardik Martin talks about how he was born in Bagdad and first meeting Scorsese at New York University. Among the stuff Martin mentions are how the film started out in 1965 as a short called "Bring on the Dancing Girls," star Harvey Keitel was working as a court stenographer at the time he played the lead, storyboards were done for every scene, additional shooting for the picture being done in 1967, distributor Joseph Brenner requesting that a fantasy sequence with nudity be added in order to enhance the film's commercial appeal, Keitel in some ways was playing Scorsese's alter ego, and Roger Ebert gave this movie an extremely favorable review. Loaded with nice behind-the-scenes photos and choice clips, it's well worth seeing for fans of the film.