Death in the West was the 1976 British TV documentary which used the Marlboro cowboy as the starting point for a discussion on smoking and health. The film became controversial when Americans for Nonsmokers' Rights started showing it in America in spite of the industry's legal protests.
Someone has now put it up on Youtube and it's still worth watching, especially for those of you who have been following the debate round at Frank's. Of particular historical interest are the interviews with the still defiantly doubtful executives from Philip Morris. Some of this dialogue is quoted in Velvet Glove, Iron Fist.