f this were to be a variant on the famous Agatha Christie train story, then "Hercule Poirot" may have ended up having an entire train's worth of murders to investigate. Rarely, can any one journey involve so many miscreants as this one from Paris to Rome. Geographically, it isn't that far - but when a man goes aboard intent on acquiring a recently stolen van Dyke painting - the folks who originallver mais...