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July 1961, Moscow.

Oleg Penkovsky walks into the park on Svetnoi Boulevard.

He moves through the crowds enjoying the brief Moscow summer,

his eyes scanning their faces for Janet Chisholm,

his new MI6 contact.

He has only ever seen her in a black and white photograph.

Now he needs to spot her amid the bustling crowds.

He sees her.

At the end of a row of trees, slightly away from the throng,

he makes his way towards her,

conscious that either of them may be being followed by the KGB.

Chisholm is sitting with her baby in a pram as her two other young children play nearby.

Penkovsky draws near, stops and smiles at the kids as they play.

"'Prieuette. I'm terribly sorry. We don't speak Russian. Um, me, me chavurim

for Rusky. Ah, English. Excellent. I am sorry. You have very charming children. Thank you very much.

Perhaps I may offer them some sweets. These are Drages, the one that every Soviet child loves.

Pinkowski holds out a box of traditional Soviet candies.

But there are no kids' treats in this box.

Instead, it is filled with the roles of film he has taken of top-secret military documents.

Chisholm takes the box, bends down, and expertly switches it with an identical box full of actual

sweets she has hidden in her pram.

...