Machines are everywhere. They run our factory assembly lines and make our coffee. But humanoid robots—machines with human-like capabilities—have long been the stuff of science fiction. Until now. Fueled by an ambitious DARPA challenge, the race is on to design a robot that can replace humans in disaster relief situations. Follow the robots and the engineers that program them as they strive to make their way out of the lab and into the real world. But how capable are they, really? How close are we to a future where humanoid robots are part of our everyday lives? And what will the future look like with robots that can do a human's job? NOVA investigates the cutting-edge technologies that are advancing robotics—and the enormous challenges that robots still face.