With access to the world's leading robot-makers, they meet the trailblazing machines who pioneered key evolutionary leaps for robot-kind, and their most advanced descendants, to uncover just how far we've really come. While Ben is unnerved by the rate that robots are evolving, Danielle is welcoming them with open arms. Ben meets one of the most humanlike robots in the world - Erica - whose sense of humour falls flat. He also finds out why it's so difficult for robots to walk like us. The episode uncovers the roots with our obsession with robots in human form, with a visit to the fearsome Eric. Danielle meets an early pioneer of robotic movement, who led the way for robots to take over the workplace, and ends up in a sea of robot arms, working in beautiful robotic harmony at a car plant.