This is perhaps slightly worse than the Tinker Tailor Soldier Spy, but still amazing.
Some difficult points:
  • how did the general deduce that the old woman's daughter had a link to Karla? It must be linked to the fact that the Russian agent who made the offer was a Karla-man.
  • some things are hard to understand without having seen the previous Tinker Tailor Soldier Spy, e.g. they say nothing clearly who Toby Esterhase is, he now works on art sales
  • but others are inconsistent, e.g. they changed the actor for Peter Guillam...
Video 1. Alec Guiness interview on his role in Star Wars. Source.