Six unidentified objects were seen near Maury Island, Washington; two Air Force officers later came to the site, investigated, and collected evidence. Their plane crashed near Kelso, Washington. The crew analyzes the crash site and looks at evidence.

The team checks out the reports of Unidentified Submerged Objects (USOs), one of which reportedly caused the crash of a single-engine light aircraft, off the coast of Santa Catalina Island, California.

A mysterious object was seen flying towards the U.S. Air Force in El Paso, Texas. When the U.S. military arrived to the scene, the Mexican military had already arrived; all of its members were found dead. The team investigates the crash site.

Claims of objects being implanted in human beings by alien abductions are investigated by the team, along with the help of several accredited doctors and scientists.

A strange object was seen flying toward Bentwaters RAF base in England, a base holding nuclear materials. The team investigates and Nick Pope, former British Prime Minister of Defense, speaks about the incident.

The team travels around the country to hear first-hand accounts from police officers of unexplained sightings.

The theory that technology thought to have come from UFOs and UFO crash sites is used for U.S. military aircraft is investigated. The site of the Roswell crash is a major focus point of the investigation.

The team looks into New York's Hudson Valley; Sedona, Arizona; and Britain's Stonehenge, to determine what makes them purported UFO hotspots. .

The team interviews Terrell Copeland, a retired member of the US Marine Corps, and Michael Lee Hill, a resident of Lake Erie, about seeing unidentified objects. Their stories are found to be eerily similar.

The team is hot on the trail of a case that just happened, one that had the whole country talking just weeks ago. In December 2007, people begin seeing UFOs in the skies ninety miles from Dallas, Texas. Within a month, the reports had increased ten-fold. The UFO Hunters travel to Stephenville, Texas to investigate the strange lights in the sky. They meet witnesses never interviewed for TV, analyze strange footage shot by people all over Texas, and come to an incredible conclusion.

The team investigates incidents of pilots encountering and engaging in mid-air combat with UFOs.

On the night of October 7, 1965 an actual UFO Military Alert took place at Edwards Air Force Base in California. Also involved were the following Air Force Bases in California: Norton, George, Hamilton and March plus NORAD and the Los Angeles Air Defense Sector (LAADS). An F-106 Delta Dart Interceptor was sent up after 12 Luminous UFOs (which were high tech solid craft, under apparent intelligent control, which easily outdistanced the F-106 at 40,000 foot altitude. We have the confirmation on declassified control tower tapes, and the soldier manning the control tower that evening, Sgt. Chuck Sorrels. The audio reveals LAADS requested that Edwards AFB personnel wake up the bases UFO Officer to assess the developing situation. In 1965 Edwards AFB had a UFO Officer. The objects appeared on radar at Edwards and were also picked up on radar at San Pedro, LAADS, George AFB and were seen visually at George and several areas at Edwards. The team interviews Sgt. Sorrels, listens to the audio of the events as they happened and plot the radar and visual sightings. Former Air Force Flight Engineer Bill Scott discusses the case with the team, and the UFO Hunters speak with George Merrett, a former test pilot based at Edwards who was at Edwards on October 7, 1965 – he will tell us what he saw and give his opinions as to what might have occurred in the skies above the United States’ premiere air test facility.

The team reviews footage from NASA showing unidentified objects in space. Apollo astronaut Edgar Mitchell and former NASA contractor Donna Hare are interviewed.