Crime documentaries, investigative documentaries, have exploded in popularity in the wake of CSI and similar forensic based series which have taken the world by storm. But it started long ago. Agatha Christie, Simenon's Inspector Maigret, had already brought us to the edge of our seats: the same stories and suspense building techniques now have the full weight of audiovisual media to help keep us riveted. Be careful you may become a 'serial buyer' if you ventur into this section.