Smiley's People: Miniseries

Season overview

Role: Meticulous television and film archivist.
Task: Create a JSON object for "Smiley's People" Season 1.
Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No invented facts. No markdown. No asterisks. No headings. No bullet points in the overview. No markdown in the JSON. Output valid JSON only.
Source Material:
TMDB Synopsis: Smiley called out of retirement to settle a friend's affairs. The Circus is overwhelmed by political considerations. Clues lead to a high person in the Russian Secret service and a secret worth killing for.
Source [1]: TMDB overview (partial).
Source [2]: 1982 British six-part spy drama by BBC. Directed by Simon Langton, produced by Jonathan Powell. Adaptation of 1979 novel by John le Carré. Sequel to Tinker Tailor Soldier Spy.
Source [3]: Cast includes Alec Guinness, Eileen Atkins, and Bill Paterson.
Source [4]: 1982-1982, 1 season, Drama, Suspense, TV-14. George Smiley (Sir Alec Guinness).
Source [5]: Six-part BBC series from 1982. Based on John le Carré story. Smiley is yanked out of retirement to tidy up the offing of an elderly Estonian émigré.
Overview (Target 160-220 words):
Smiley's People is a 1982 British six-part spy drama produced by the BBC. Directed by Simon Langton and produced by Jonathan Powell, the series is a television adaptation of the 1979 spy novel of the same name by John le Carré. It serves as a sequel to Tinker Tailor Soldier Spy. The narrative follows George Smiley, portrayed by Sir Alec Guinness, who is called out of retirement to settle the affairs of a friend. Specifically, Smiley is yanked out of retirement to tidy up the offing of an elderly Estonian émigré. As he begins to follow up the clues from his friend's past days, he finds that his old organization, the Circus, is so overwhelmed by political considerations that it does not want to know what happened. Smiley begins poking about in the Secret Service's undergrowth, discovering that the clues lead to a high person in the Russian Secret service. This investigation reveals a secret that is important enough to kill for. The series is categorized as a drama and suspense production.
Word Count Check (Overview):
"Smiley