Up to episode 18. The content is good, a lot of it repeats knowledge a space buff already knows, but still enjoyable. The only real complaint is pronunciation - while Mike (the author) apologizes each & every episode for this, this is an *audio* podcast, for which pronunciation is a really important aspect, especially for names the listener isn't familiar with. Even well-known names get butchered, like "Korolev"; Fortunately he corrects that one in later podcasts. I was a bit surprised he had 2 *whole* episodes on the Mercury 7 selection, given that it's a "rocket" history. The original audio clips are a great touch, making good use of the audio podcast format.