the basic genre be a thriller intercut with an uncomfortable menage a trois . fellowes have try to make a lot more out of this and use the lie of the title in order to bring about all manner of small twist and invariably design to surprise the character more than the audience . it really rather messy though . fellowes doesn not seem interested present the thriller element in a fashion that will keep u seat edge . rather his focus be on the moral predicament themselves . the dialogue be inconsistent and stagey here and vernacular there and with the constant surprise of realism undone by the occasional cliché landmine . though there be no fussing over the location so that the actor can get on with exist in their space the dreadful score can not create a further dimension and often work against the emotional momentum of give set piece . there also a very prosaic and dare i say it british feel to the filming . i do not want to see a document of two successful middle class people catch in an extraordinary situation and i want to see some sort of artful recounting of the story . finally it be and in fact and the story which let the rest down . just a the element of suspense be rather flat so the story be an asymmetric sum of subplots of different shape and size and woven a a vehicle for character examination . wilkinson and watson support this meta essay with good performance and john warnaby ebullient colleague simon to wilkinson be a welcome foil for much of the brow furrowing . i be disappoint while not that it bad and but that it could have be much well . negative .