Alot of the things you guys are talking about over my head cause I'm a newb.
BTW: My wife and I watched the Green Death a few nights ago which was our first of that Doctor. It was really well done. The actor was very good and much more athletic and physical even in his old age than Tom Baker. The sets were a lot better than the Baker ones as well.
One of my faves. I always point to this one when people say the Doctor never had romantic feelings for a companion. To my viewing he obviously had feelings for Jo and when she leaves with that hippie at the end you Pertwee really made you feel sorry for the Doctor.