This is unique in giving me the feeling that I am watching, not a period drama, but action filmed at the time. The creators must have started with actual footage from the time then built on it to give us a macabre version of actual events twisted and hacked beyond the possible. I keep on expecting to see Monsieur Proust lurking in the shadows. I might add that I am a fan of Frank Tallis's Liebermann novels set in Vienna at the same period, and I so wish the Paris Police team had had the job of bringing them to television. Will there be a Paris Police 2010? And the horrors of 1915? I am sure they would be well worth waiting for!