We've wrapped production on SFX01: Sandwich Science Pt. 2 (w/Robert Krulwich), the limited edition continuation of one of our most popular episodes ever. But you can't get it on iTunes. In fact, you can only get it by becoming a Sporkful subscriber for $10/month, or by making a one-time donation of $100. (You can donate here.) If you do either, you not only get this awesome Krulwich episode, you also get our pilot episode, which we did before we did Episode 1. And you get a Sporkful T-shirt, not sold in stores. Here's a sneak peek clip of the limited edition Sandwich Science episode: