
S01E01 A Mother's Assistance
Once more, George Smiley is brought out of retirement to look into the murder of an old colleague.
The investigation of Vladimir's murder leads Smiley to interrogate his latest suspect. Smiley is told to stop investigating the case by a man on a motorcycle, and he just blows him off. Smiley's next stop is Oxfordshire, speaking to a mother and a daughter about the case.
Called out of retirement to settle the affairs of a friend, Smiley finds his old organization, the Circus, so overwhelmed by political considerations that it doesn't want to know what happened. He begins to follow up the clues of his friends past days, discovering that the clues lead to a high person in the Russian Secret service, and a secret important enough to kill for.