History's Greatest Mysteries season 6 episode 8

Episode title: The Rendlesham Forest Incident

A surreal event outside a U.S. Air Force base near the Rendlesham Forest in England, becomes an international legend and one of history's strangest unidentified encounters. For more than 40 years, the question has endured... What was really out there in the Rendlesham Forest and what were the Rendlesham lights?