Fantastic documentary on the current understanding of evolution. We are gaining more and more knowledge about the actual mechanisms involved. We are learning about genes that switch other genes on and off and "boss" genes that control the timing and intensity of other genes during development. Even slight changes here can have drastic effects on the formation of the animal. Also, an idea is put forth that a small change in the genes responsible for jaw muscle development may have led to humans developing such a large brain and distinguishing ourselves from the rest of the animal kingdom.The first couple parts rehash Darwin himself and the lead-up to his idea of evolution by natural selection. Nothing new here (except to the willfully ignorant fingers-in-ears crowd). Parts 4, 5 and 6 start to pick up with new knowledge of the mechanics involved and then it gets into the implications of all this.I'm a baseball-throwing' slack-jawed primate that descended from a fish. And so are you.