Investigative journalist Tim Tate digs into Britains real life X-Files and the strange cases hidden in official archives. From a jetliner crash blamed on flying saucers to a sea serpent encounter, a deadly ghost panic, and the infamous Solway spaceman photo, this episode separates myth from what the files actually show. Deep beneath the streets of London sit thousands of highly classified and previously top-secret government files which disclose the details of extensive military, spy agency and police investigations into the paranormal. With hundreds of hours dedicated to examining these formerly off-limits documents from the National Archives, Tate reveals just how far authorities on both sides of the Atlantic were willing to go to venture into the unknown.