In each episode, the team investigates reports of unidentified aerial phenomena, including interviewing witnesses of close encounters with UFOs, USOs (unidentified submerged objects), and supposed extraterrestrial life. They also analyze any evidence collected such as photographs, video, or recovered physical material. They also conduct research with other investigators and scientists in the field in an attempt to find conclusive evidence that a report is real or a hoax. The show includes investigations of long-standing UFO cases, such as the Roswell, New Mexico UFO crash incident and other famous sightings throughout history.