The UFO phenomenon gets a two-hour primetime survey, starting with Kenneth Arnold's 1947 sighting near Mount Rainier, the encounter that gave the world the term "flying saucer," and running forward to cases still open today. Police officers, airline pilots, and military personnel describe encounters on camera alongside ordinary witnesses, while scientists who search for extraterrestrial life through SETI weigh in on what would actually count as evidence. The program spends real time on Roswell, New Mexico, laying out the competing accounts of what crashed there in 1947 and why the story never died, then turns to reports of alien abduction and the psychologists and skeptics who question them. Professional debunkers get equal airtime with believers, so the special functions less as advocacy than as an inventory of claims, testimony, and counterargument spanning five decades of UFO reports. It closes without resolving the central question, leaving the viewer with the raw material rather than a verdict.