I was idly watching the end of an old TV episode of Poirot the other day wherein the world’s third most famous Belgian had, as always, gathered the eight or so suspects together in the drawing room and began pointing the finger of suspicion at each of them in turn. It seemed to me that there were two types of suspense on offer here: the identity of the murderer, and what, if any, small changes would occur in this strictly adhered to formula of going through each suspect one by one. (No, not the sweet old lady!) As long as the audience knows all the possibilities, then quite small variations can generate suspense as we try to outguess the detective. In other words, complete familiarity offers a way out of complete boredom: as long as everyone knows the rules in detail, even small variations will generate suspense. It’s almost impossible by now to create a major surprise in this particular setup, mostly because Christie herself pretty much mined them out (they all did it in Murder on the Orient Express). This almost equal knowledge between reader (or watcher) and writer is what creates suspense but also limits it (unless the adapter, gone mad after years of writing minor variations on the same ending, has Poirot or Miss Marple being revealed as the murderer). Suspense has, I think, its limitations when it comes to engaging the emotions of the audience — it’s the emotion of a game.
Consider Seven as an alternative. The setup is grislier than a Christie and the setting, a corrupt city, as far away as you can get. But it’s still about a series of carefully planned murders by someone unknown and cool and ruthless in his execution of the crime. Written by Andrew Kevin Walker, Seven takes us on certainly an original journey with a brilliant concept at its heart — a moralizing murderer sardonically reenacting the seven deadly sins. But what is alleged to have happened before Fincher took over as director is revealing. It’s said that the studio insisted that while they were prepared to finance the film, they would only do so if the writer changed the last quarter of the film, when the script completely departs from the murder thriller and creates something utterly new. It stops being a game of suspense for the insider/viewer by abandoning the game altogether. The identity of the murderer, blasphemously, is revealed not by the detached intelligence of the detectives but by the murderer himself. By rejecting the fundamental desire to get away with it, the killer takes command just at the point where we are waiting for the forces of good to squeeze him into a place of abject failure by revealing the fundamental things he does not want revealed, his motives and his guilt. Apparently the studio forced Walker to undo all this and rewrite the ending so that Christie reigns supreme.
Most people know the name Mulholland Drive from the eponymous David Lynch movie. If you go deeper, you recognize the roman à clef elements that were interpreted into the plot of 
The former chairman of the Booker Prize committee said last month,







In my reply to Alan’s e-mail, I remember noting that the whole story was in fact the classic noir tale — wife hires man to kill husband, only to find herself trapped in her own web of deception.