MST3K Revival League Podcast
There may not be any official MST3K podcasts out there, but a small group of MSTies in Colorado made the next best thing: The MST3K Revival League Podcast! It's a weekly show featuring interviews with cast (both past and present), crew members — pretty much anyone associated with Mystery Science Theater 3000.
The podcast has been running for over a year and has 65 episodes and counting. The most recent installment is an interview with creator Joel Hodgson and Kickstarter Guru Ivan Askwith, which you can listen to below.
We'd highly recommend going through the archives and listening to the many excellent episodes they've lovingly assembled since launching. Check them out on Soundcloud, and follow their many updates on Twitter.