An Ingmar Bergman film would probably owe a sizeable bulk of its import and its direction and its quality to the directorial end and to the director because it's uniquely a Bergman film. But that again is not the general - no, that's much more the exception than the rule.
Rod SerlingYou must always assume that the relationship between writer and producer is that of adversaries - however you slice it. They may be your dearest friends, and they'll invite you to dinner, but when all the smoke clears and the ozone lifts, your enemy is the producer, that's the guy you're competing with, and you have to battle him, just as if you were an adversary.
Rod Serling