You can watch what appears to be all the lectures of a Yale introduction to political philosophy course from Steven B. Smith. The first is lecture is here but at this point, I want to call attention to his lectures on Locke, the first of the three being the following:
I've not listened past the first few minutes here, so if you sit through it, please post some comments re. what you got out of it. It sounds like this course would do well to tie together several of our episodes for those interested, including our upcoming one (episode 40) on Plato's Republic and some Aristotle, whose politics we will likely not get around to for a while still. You also get, on this clip, some more detail on the First Treatise than we gave in the episode.