Spying Game: To Catch a Spy (Episode 3)

A 1999 Discovery Channel History Documentary narrated by Alan Bates.

Episode 3: To most patrons of a certain Berlin cafe, the man with the magazine under his arm is just another customer. But to the three or four other spies watching him, he's one of them. Only problem - which side is he on - this week? In a world where loyalties change with the wind - or a better offer - counterespionage is a necessity. Enter this complex maze where friends suddenly become foes - and you may be the next target.
Since WWII, the US and Britain have developed more sophisticated satellite airplane tactics, in some cases making the secret agent obsolete. Explore the world of counterespionage.