The Tolkien Professor is Professor Corey Olsen, who is an English professor at Washington College, and he has various lecture-style podcasts on . . . you guessed it: Tolkien!
His first introductory lecture is about "How to Read Tolkien and why."
He even has a lecture series on The Hobbit and has written a book on the subject.
With tons of various lectures, be sure to check out the lecture feed for a list of all the subjects. So, if you love Tolkien and want to know more about Middle Earth, or even about medieval literature in general, be sure to check out The Tolkien Professor podcast.
For more information, here's a TED Talk Professor Olsen recently did: