In the Bible's Book of Samuel, David fought and killed the legendary giant Goliath. Their epic battle took place outside the city of Gath, a legendary fortress thought lost to history. That is until archaeologists stumble upon the remains of an ancient siege that may well hold the key to finding this ancient city. Embark on an eye-opening journey as experts investigate the startling mysteries captured by satellites orbiting the Earth: from hidden worlds to unexplainable natural phenomena.