Dalton has some moments of excellence in this series of lectures on the relationship between the individual, society, and state. His treatment of Ancient Greek theorists--Sophocles, Plato, and Aristotle--is interesting. Lecture 8 on Machiavelli is particularly strong, detailing both how contemporary Italian political disorder shaped Machiavelli's perspective and how his outlook built on or rejected the writings of Plato and Aristotle. Dalton's arguments are hardly unique, but he presents his material well.
These strengths are outweighed by Dalton's seemingly rambling choices of subject and his numerous tangents. As other reviewers have mentioned, Dalton skips over numerous important figures, from Medieval scholars such as Augustine and Aquinas to such contemporary commentators as Rawls. Even worse, Dalton increasingly loses his focus in the course of the lectures. A large chunk of the presentation on Marx, for example, is spent outlining a proposed walking tour of London featuring Marx's grave, rooming houses, and seat in the British Library. The listener is treated to similar touring advice for visiting Walden Pond, complete with reminiscences of Dalton's anniversary visits to Thorough's old home with his wife. The Freud lecture veers further afield, delving into Freudian conceptions of the unconscious. The first and last lecture, focusing on Hindu and Gandhi thought, seem almost entirely detached from the overall discussion. Dalton's efforts to illustrate his arguments with contemporary examples create an additional problem. While such modern links might have been useful in 1991, when these lectures were given, they often create additional disconnects for the listener in 2016.
In short, there are far better resources available for listeners seeking a review of political theory or power relationships. One option, also available from The Great Courses, is Cahoone's 2014 The Modern Political Tradition: Hobbes to Habermas.