Harry Frankfurt's early work makes an important distinction between moral responsibility and free will. Frankfurt begins by focusing on the notion of responsibility, as supplying counterexamples to the "principle of alternative possibilities"; he then turns to an apparently independent account of free will, in terms of his well- known hierarchy of desires. But the two notions seem to reestablish contact in Frankfurt's later discussion of issues and cases. The present article sets up a putative "Frankfurtian" account of moral responsibility that involves the potential for free will, as suggested by some of Frankfurt's later remarks about "taking" responsibility. While correcting what seem to be some common misinterpretations of Frankfurt's view, the article attempts to extract some reasons for dissatisfaction with it from consideration of cases of unfreedom, particularly cases involving addiction.