To celebrate the 50th anniversary of the Apollo 11 moon landing, Professor Brian Cox and Dara O Briain travel to Cape Canaveral in Florida - where the historic mission began. They hear first-hand from former astronaut Charlie Duke what it was like to guide Neil Armstrong and Buzz Aldrin to the surface of the Moon and how he followed in their footsteps three years later. They also are joined by Kevin Fong and Hannah Fry to explore the latest developments in human space flight - from cutting-edge spacewalk technology to a future Mars buggy - while Nicole Stott gives a tour of the Atlantis space shuttle she flew on and explains how this unique vehicle helped build the International Space Station.