When Sam Sherpa-Moore landed a cameo in the Doctor Who Christmas special Joy to the World , playing the iconic Sherpa Tenzing Norgay, few knew the remarkable twist behind his casting. The 24-year-old actor, from Bloxham, Oxfordshire, wasn’t just stepping into the shoes of a famous mountaineer - he was playing his great-great uncle. Sam is a descendant of the legendary Sherpa who first summited Mount Everest with Sir Edmund Hillary in 1953, an achievement which cemented Tenzing Norgay as a