What happens to scientists and others revealed by tobacco industry documents to have been agents for the brown army? Readers are invited to submit their modern day discoveries of those names familiar to us from the tobacco papers. Meanwhile, here’s one to ponder. At a conference last December to mark the 50th anniversary of the great London smog, two figures were seen huddled together, apparently reluctant to socialise with the more than 200 other delegates present, mainly physicians and scientists. The two turned out to be George Leslie, heavily involved in organising industry sponsored conferences on indoor air quality, including some in the Far East; and John Hoskins who edited Indoor Air International (now Indoor+Built Environment of the International Society of the Built Environment) in the days when seemingly all the board were industry funded. Will they now be penning papers to show that pollution levels in cities such as London are really the cause of much of the disease blamed on smoking? Watch this space.