How can somebody be making large-scale documentaries on the BBC for four decades and still be treated as essentially an underground filmmaker? I keep asking otherwise attuned people if they’ve aware of Adam Curtis, eager to stumble across a single other being who shares my wonder at what he’s accomplished, yet always come up empty. After a while, it creates a Carnival of Souls kind of alienation, as if Curtis and his films exist in some parallel world where he just can’t be perceived.