Besides creating structures and vehicles, engineers also help disabled people rebuild their bodies and their lives. This program visits London’s Roehampton Rehabilitation Centre, where new limbs for amputees are designed and built. Two case studies—one featuring a woman with an artificial leg, the other a man with a mechanical arm—illustrate 21st-century alternatives to conventional prosthetics. Viewers learn about surgery and physical therapy needed to prepare patients for their new limbs; the advent of electronic arms that utilize small, long-lasting batteries; the working methods behind the mobility of these new appendages; and the process of custom fitting. A Discovery Channel Production. (24 minutes)