Amazingly, The Errol Morris Collection appears to be Morris's first DVD outing in this country, with the exception of the recent The Fog Of War. Even his best-known doc, The Thin Blue Line, a funny yet frightening delve into the horrors of the US justice system that was credited with overturning its subject's murder conviction, hasn't been released before. Here, it's accompanied by the two films that preceded it. Morris's 1980 debut, Gates Of Heaven, tracks two pet cemetery founders; the following year's Vernon, Florida depicts that town's eccentric citizens. But neither of these descriptions even begins to cover the truths - about people, places and commercial and social realities - that Morris's skilful technique uncovers. He is a master - although sadly not, it appears, one keen to supplement his work with extra material.