This has about 9 episodes of a Kabbalah class, which is fascinating. The Rabbi has an entertaining way of presenting the material, and I was kind of suprised to find that much of it was of a practical nature.
15 episodes about thelema, Gnosticism, OTO, Magick and all kinds of stuff. Episode 14 (?) has an interview with Jason Augustus Newcomb, who in my opinion is a great modern magician.
Gnostic lectures by Rev. Stephan Hoeller. I've listened to all the free ones, and I have to say the man has an impressive intellect and an engaging manner. Highly recommended.