In this final program, we explore Darwin's most controversial work. Having established evolutionary principles with plants, Darwin began work on human evolution. From earthworms he moved on to human parallels with primates, who he argued were humans' closest relation. The Victorian world was not amused. Yet Darwin was of course proved to be a radical and fearless thinker, correct in his analysis. Naturalist Jimmy Doherty again delves into Darwin's world and experiments, bringing them to life with clear demonstrations and enthusiastic explanations. This is another gripping examination and recreation of some of the most significant experiments and observations in modern science.