This made it slightly hard work, but enjoyable nonetheless. I tend to think of the Cold War as a monochrome thing of the 1950s and '60s, and here it is happening within my lifetime, soundtracked by Eurythmics and 99 Luftballons.
I spent much of the episode shouting at the unwilling 24-year-old East German spy who, poor little chap, can hardly help not being much good at a job he's been unexpectedly forced into, and I'm greatly looking forward to the next instalment.