UFO: Alien Invasion

For decades, people have reported seeing UFOs in the sky all over the world. But why do people continually think they see the flying saucers? Many of the reported sightings have been dismissed because of being reported by unreliable witnesses or as being likely hoaxes, but some aren't as easy to dismiss so quickly. This programme investigates those reports that are harder to explain away. The reported events include pilots witnessing strange lights in New Zealand and a fiery, diamond-shaped object in Texas that was claimed to cause confusing physical illnesses.