UFO (TV series)
A single season of 26 episodes (including the pilot) was filmed over the course of more than a year; a five-month production break was caused by the closure of MGM-British Studios in Borehamwood, where the show was initially made. Production then moved to Pinewood Studios in Buckinghamshire. "UFO" was first broadcast in the UK and Canada in 1970, and in US syndication over the next two years.
UFO Files
UFO Files is an American television series that was produced from 2004 to 2007 for The History Channel. The program covers the phenomena of unidentified flying and submerged objects, close encounters with alleged extraterrestrial life, and alleged military and government cover-up conspiracies.