UFO (TV series)
UFO is a 1970 British science fiction television series about an alien invasion of Earth. It was created by Gerry Anderson and Sylvia Anderson with Reg Hill, and produced by the Andersons and Lew Grade's Century 21 Productions for Grade's ITC Entertainment company.
Project U.F.O.
In retrospect, "Project U.F.O." anticipated many of the themes of "The X-Files," which aired 14 years later, but without the latter show's romantic subtext or its anti-government (or, for that matter, its anti-alien) paranoia. As with Blue Book, many of the UFO sightings on "Project UFO" turned out to have conventional explanations. Some, however, were left unexplained, and suggestive of alien contact. By the second season, the investigators had themselves experienced a UFO sighting.