margaret thatcher was uncompromising in her dislike of socialism and of communism. and that is what drove her. i look so young and innocent. my job was really to make sure that 10 downing street worked well for the prime minister. yes, okay, certainly. margot! [narrator] margaret thatcher knows that it's not just politics that dictates the key moves in the cold war. [lord robin] margaret thatcher was fascinated by intelligence. part of it was the glamor. but also, she liked to collect as much information as possible, and intelligence was one of the sources. [indistinct chattering] there was a special box in number 10 in which there would have been regular reports of anything which became known about soviet activity in the u.k.