Watch Timewatch Season 23 Online

Examining the UFO phenomenon in Britain since the 1950s, when alleged sightings began and Clement Attlee formed the Flying Saucer Working Party. The documentary recalls how UFOs became a symbol of the communist threat during the Cold War and - with access to previously secret files - shows how paranoia over these mysterious vessels struck at the heart of the political, military, and royal establishments. NEW SERIES 1/5.