This documentary consists of 8 alien sightings dating from 1978 to 1987. One thing to mention is that these files were kept as a secret and up until this date they were unknown to the society. A simple explanation lies behind this - these files weren't tracked as a 'top secret' so it didn't achieve much media attention as it should do. On October 20, 2008, more UFO files were released. One case released detailed that in 1991 an Alitalia passenger aircraft was approaching London Heathrow Airport when the pilots saw what they described as a ""cruise missile"" fly extremely close to the cockpit.