Inferno by Henri-Georges Clouzot is film that was never finished. It was started in 1964 and abandoned. Decades later it premieres at the New York Film Festival as a tale of a filmmaker in the search of his magnum opus.
Another filmmaker Serge Bromberg finishes the job as he resurrects the original footage and interviews people, who worked on the set of Inferno.
Below is a video about the film as told by the Film Society of Lincoln Center.
The film is scheduled to screen on 10/04/2009 at 12:00 PM
Also, here is a light and chatty audio review of the three films from the New York Film festival: Lebanon, Inferno and Room and a Half.