Seven Days To Noon

Professor Willingdon (Barry Jones) is a scientist engaged on highly secret Government research. When he sends a letter to 10 Downing St threatening to blow up the Houses of Parliament within 7 days unless the Prime Minister agrees to his demands, it is first dismissed as a hoax. When Willingdon disappears however, alarm bells ring, and soon the whole of London has joined in the manhunt for this modern day Guy Fawkes.