the movie lack credence with the helicopter which do not exist until the 1950s . but no woman would do what be do here and even a woman before the woman movement of the 60 and 70 . about the only portion of the movie that you could believe in be that germany would want to know where the landing would be . ignore for the moment that the british have capture all the spy but even if they have not and they wouldn not have let one roam around like this just to reassure the german that the landing would be at calais . it isn not one major thing that make the movie not work . it be the culmination of all the thing wrong that make the movie fail . bad directing and bad script and no attempt at authenticity ( at all ) all combine to just make the movie fall flat . generally speak spy should fade into the woodwork . the suspense come in with the spy wonder if the information they have be valid or not and worry about be detect . on this one that game be over from the start . this spy be do anything but spy . your only chance at get something that have some credibility and instill some suspense may be to read the book .