1. British Broadcasting Corporation. Written Archives Centre, Caversham, R78/1233/1, ‘Spy!’
2. British Broadcasting Corporation, Written Archives Centre, Caversham, Audience Research Report: Spy! 1: John Vassall, February 13, 1980.
3. British Broadcasting Corporation, Written Archives Centre, Caversham, Audience Research Report: Spy! 6: Cynthia, April 2, 1980.
4. The National Archives of the UK (TNA), Records of the Cabinet Office (CAB), 103/742, Official History of British Intelligence in the Second World War: Volume 5, Strategic Deception; 103/743, Official History of British Intelligence in the Second World War: Volume 4, Security and Counter-Intelligence.
5. The Power of The Right Stuff: A Quasi-Experimental Field Test of the Docudrama Hypothesis