World on a Wire , 1973 German science fiction television serial starring Klaus Loiwitsch ( who played the Odessa assassin in the film The Odessa File ). It was made for German television and originally aired in 1973, as a two-part miniseries.Imagine , the world is just a computer simulation being used to test ideas and theories out on its computer subjects.Then one of the characters starts to cotton on that the world isn’t real after all , but what will he do about it and his own situation? Based on the book Simulacron 3 by Daniel F Galouye. Read the book many years ago was glad to come across this series on YouTube. Excellent.With English subtitles.