A pie dough comes together exactly like a biscuit only there is very, very little liquid and no leavening involved. Other than that, the same rules apply. My best advice: handle the dough as little as possible.
Alton BrownYou know, [skin] happens at the gravy boat stage - right? - or this happens when you're trying to keep it warm. So the way that I avoid this is I keep my gravy - the second it's done, I put it in a thermos, which will keep it hot and will prevent air from getting to the surface. And I keep it there till the last moment. The last thing that goes out to the table is the gravy, and I pour it out of the thermos and immediately move it in.
Alton BrownI think a lot of food shows, especially when we started 'Good Eats' back in the late '90s, they were still really about food. 'Good Eats' isn't about food, it's about entertainment. If, however, we can virally infect you with knowledge or interest, then all the better.
Alton Brown