History Channel - Spy Web International Espionage (1999) Part 8 MI5

Spy Web International Espionage uncovers some of the most fascinating spying and espionage stories which helped win victory in the most harrowing of circumstances. Throughout history, espionage and covert operations have been powerful but shadowy forces. Hidden deep within the daily workings of governments is a secret world of mystery, danger, and intrigue. A world where deception is a form of art. Where people are never who they say they are. Where the tiniest observation has the power to save a nation or spark a global war. The world of the spy is what most of us associate with popular fiction and film but the true story can be more fascinating, surprising, and important. From World War I onward, these revelations alter the way in which history is viewed–and the bravery of the intelligence services–especially those working behind enemy lines. This is the story of spies, intelligence operations and deceptions that changed the course of history.

Part 8 MI5

During both World Wars, Britain's counter-espionage service proved highly effective - no enemy spies operated for more than a few days, and many were “turned” to send false intelligence back home. Later, MI5 faced criticism for failing to expose the Cambridge spies, then remodelled itself as a counter-terrorist organisation.

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