This film is definitely dark, both actually and metaphorically. The interior shots are often shot in gloomy interiors or under harsh lighting, in Lumet's trademark style. The exterior shots are overpoweringly glaring by contrast. This serves to point up the darkness of the material and the almost hopeless sense of defeat that the film concludes on.
The film is carried -- driven - by an astonishing performance by Nick Nolte whose physical bulk is emphasised by the camera angles. Nolte's characterisation of the central character of Mike Brennan is superb -- the need to be centre of attention, the casual domination of his colleagues, even the over-emphasis of the droopy moustache as a contribution to the shape of the character. Nolte is menace personified: a swaggering bully; a hair-trigger temper wrapped in apparent bonhomie; the alpha male in the pack; generous with his friendship as long as unquestioning loyalty comes in return. All the other characters pale in the face of this bravura display of acting.
This is an excellent film carrying all Lumet's trademark philosophical baggage: the individual (good or bad) standing out against society's flow; a distorted sense of loyalty and honour that leads to doom; wrong dealing in high places; the corruptness of authority. it is probably one of his best and deserves more attantion than it receives.