Disc.Sci+1 Rio De Janeiro Power Grid. Danny is in Brazil where they are building one of the world's largest hydroelectric projects, tunnelling through seven mountains and building two dams. S6, Ep4 2026-04-27 South African Gold Mine. Danny Forster visits the deepest place on Earth; South Africa's Mponeng Gold Mine - the most dangerous construction site on the planet. S6, Ep5 2026-04-27 Experimental Soldiers. At the height of the Cold War, the USA searches for a way to create a generation of 'Supersoldiers' who use telepathy to win battles. S2, Ep6 2026-04-27 Mysteries In The Alien Desert. The Nazca Lines are mysterious symbols that have been carved into the Atacama Desert more than a thousand years ago. How and why were they created? S4, Ep1 2026-04-27 Fire In The Cockpit. Experts investigate to see if the fire on Apollo 1 that killed three astronauts was a cover-up. Was it a tragic accident or part of the moon landing conspiracy? S1, Ep1 2026-04-27 CIA's Secret Space War. Confidential CIA files reveal a secret war for space between America and the Soviets. And, experts investigate American espionage during the Apollo programme. S1, Ep3 2026-04-28