Never before broadcast, UFO and Alien stories are told directly by the people who experienced them. As we are taken through the events as they unfolded, UFO experts and ‘debunkers’ offer their opinion as to what they may have seen or experienced. From individuals with corroborating stories, people with photographic evidence of their encounters, and hypnotic regression to unlock lost memories of missing time, this series will explore convincing accounts of one of the world's biggest questions... are we alone?