Human evolution is the subject of this homemade science documentary, the opening chapter in a series that runs to at least twenty installments. Black Ryder Films builds the episode around a specific paleoanthropological update: three fossils recovered from Koobi Fora in northern Kenya, including a face, that support the idea of two parallel lineages coexisting early in the history of the genus Homo. The fossils point to two separate species of early Homo living alongside Homo erectus during the early Pleistocene in eastern Africa, complicating the old single-line picture of human ancestry. The film frames itself explicitly as a snapshot of a field that keeps revising itself as new finds turn up, rather than a settled account. It is a small-scale, low-budget production rather than a broadcast documentary, aimed at laying out one piece of current fossil evidence before the series presumably moves on to other chapters in the human evolutionary story.