At this point 30 years after the fall of the Berlin Wall and the iron curtain, this film is vital as a reminder of the inhuman conditions imposed on Berliners at the time. The realism couldn't be made more authentic, and there are lots of more characters than just Sean Flynn and José Ferrer, and everyone plays his own part, in losing control, in changing sides, in persisting on the necessity of human charity, of military.cadaver discipline, of inevitability of destiny, and so on. It is in black and white in almost exclusively nocturnal scenery, which adds to the tension, that is constantly building up as complications never end but keep piling up with sudden turns of events. So this is actually a documentary, no film, no theatre show, but an effort to stick to reality as closely as possible with admirable results that will last.