'Careless Talk Costs Lives'. That's the clear message here, but we are not talking gossip down the pub after a few pints. We are talking more of the shrewd and manipulative techniques used by the Nazis to obtain information, entirely unwittingly, from the stranded crew of a bomber shot down over Italy. Initially they all respond with name, rank and serial number and their interrogating major (Louis Adlon) appears to respect their rights under the Geneva Convention. Gradually, though, they apply tactics that divide and conquer asking seemingly harmess questions about units and bases. They…