In 1997, over the city of Phoenix, Arizona, one of the most spectacular mass UFO sighting of all time took place. Thousands of people witnessed a series of bright orange orbs moving in formation silently overhead. Despite hours of video and photographic evidence this case remains unexplained. Craig and Sarah take on the extraordinary ‘Phoenix Lights’ case, first speaking to eyewitness nurse David Parker who provides a vivid description of his close-up encounter with a huge boomerang-shaped UFO that passed directly overhead.