Without a doubt, this film is one of the worst films ever, in terms of the disparity between the IMDb rating (8.2 at this writing) and the actual quality of the movie (about 4.2 in my estimation). The plot boring and incoherent. Eeerie, sharp B&W photography and ear-damaging sound levels are no substitute for coherent, revelatory dialog. Contrast any of the great Hitchcock films with this drivel! Hitchcock could have us on the edge of our seats, even in rather mundane circumatances. In this disastrous film, we have little idea who these two characters are, and even less idea of why we should care. The emotional shifts seem entirely unmotivated. We are supposed to attribute them to only 4 weeks of reasonably hard work in a moderately claustrophobic environment. This is simply crazy! ANY normal adult could put up with these conditions for months, and virtually anyone who ever served in the military did! After 15 minutes, my wife and I were thinking of leaving. But that 8.2 rating led us to stay. It was a huge mistake. We should have left.