I'll tell ya what, like a nimrod I forgot to watch it every time and missed it basically, but I caught some stuff at the end and this was a REALLY in-depth program.
I was thinking it'd be more animal planet than Star Wars, and really would only glancingly compare SW animal life sparsely to earth animal life. HOw wrong I was for that little bit I saw.
Of particular interest was them describing Wookiee's and how in-depth LFL went into their backgrounds. It was addressed how Kashyyyk was (as Lucas wanted it) to be a jungle world... I felt it kept to EU well, and Lucas's early visions of the planet, but someone brought up that Wookiee's would be hot with all that fur, but the orangatan's (sp) were used as a counter-argument due to their habitats and physiology... Fascinating.
PLUS it confirmed something I wasn't sure was "true" or not, but that Chewbacca indeed is a runt. That Lucas explained the Wookiee's to the production people and said that basically fans would be surprised to see Chewbacca is very small for his species, and that true Wookiees are the gargantuans we got with the preview action figure while some are smaller and of course there's in-between I suppose.
That makes Chewie's character a lot more loveable knowing that he's not the bruiser Han pimps him out to be, but more or less just a friend... It's the REAL Wookiee's you need to watch out for while playing them at holo-chess.
I wish I'd caught the full show now. That was a valuable resource I felt. Worth having on DVD.