Mark Crislip (an M.D. and infectious disease specialist) has several entertaining podcasts:
Puscast, a biweekly, CME-accredited review of the infectious disease literature. I actually find this one to be good listening, despite not being a health care worker.
Quackcast, a “podcast review of Quacks, Frauds and Charlatans. Oops. That’s not right. That should be Supplements, Complementary and Alternative Medicine i.e. SCAM.” Highly rational and frequently hilarious.
In addition, there are a couple others I like:
Skeptic’s Guide to the Universe. A panel of skeptics, most of whom are involved in the New England Skeptical Society. Plenty of good info on this podcast, as well as a weekly dose of rational thinking. Worth listening to. Episodes range from 20 minutes to 45 minutes in length.
Brian Dunning’s Skeptoid, a short, typically single-topic, skeptical podcast. Most episodes are under 15 minutes.
I’m always on the lookout for other podcasts people think are interesting. Feel free to share.