Epsiodes 2 and 3 are on now, same url
http://blueroom.att.com/sports/teamusa/home/index.php in case you haven't watched it yet.
Epsiode 1: Heart of a Champion
Episode 2: In The Beginning
Episode 3: The System
Mary Lou talks about how in the beginning maybe there were 3 or 4, maybe 5 good gymnastics clubs, so you had to move if you didn't live in one of the cities that had the good gym, like she moved - she said it was traumatic for her. Some people even now move to workout in a certain gym.
They left out the overuse injuries a lot of people attribute to the mandatory camps...which comes to the question at the end of the episode 3 clip, what those animals have to do with the gymnastics practices they showed - answer is that's the Texas Ranch where the mandatory camps / clinics are in.