8/10 With Andrei arrested, will anyone help pregnant Anna with her inquiries?
10/10 Volkov gives Andrei a way out of execution, while Anna waits to give birth in hiding.
9/10 Andrei comes face to face with Gorya's father Volkov, and learns what the powerful can do.
7/10 Dr Brodskaya has been arrested. Now, a car door slams beneath Andrei and Anna's flat.
6/10 Anna and Andrei know they must protect Kolya. Then a call confirms their worst fears.
5/10 Anna and Andrei are warned to get out of Leningrad, but is it already too late?
4/10 Volkov's son has been discharged, but Anna and Andrei know they have done the unthinkable.
3/10 It falls to doctor Andrei to tell Vulkov what is his son's best chance of survival.
2/10 Against his better judgement, Andrei visits the vulnerable son of a feared secret official
BBC Radio 4
1/10 Leningrad 1952, when it's best not to stand out or attract attention.