Last of the Summer Wine: Series 18

Season overview

Role: Meticulous television and film archivist.
Task: Create a JSON object for "Last of the Summer Wine" Season 18.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
No invented titles, names, dates, episode counts, awards, ratings, box-office, viewership, or plot points.
Omit details not in the material.
Output: Valid JSON only (no markdown, no asterisks, no headings, no bullet points).
Keys: overview (160-220 word summary of the season's narrative arc) and primer (array of exactly 4 concise bullet points).
Source [1]: Mentions "The trio in this series consisted of:" (sentence incomplete). Mentions "The BBC's longest running comedy series." Mentions "Unencumbered by wives, jobs or any other responsibilities, three senior citi" (sentence incomplete).
Source [2]: Cast and crew credits link.
Source [3]: British sitcom set in Yorkshire, created/written by Roy Clarke, broadcast by BBC from 1973 to 2010. Premiered as Comedy Playhouse on 4 January 1973.
Source [4]: They spend days speculating about townsfolk and thinking up adventures not usually favored by the elderly. Premiered as Comedy Playhouse in 1973. Ran for 295 episodes until 2010. Longest running comedy Britain has produced.
Source [5]: Cast and crew link.
The user asks for a summary of Season 18.
The provided text contains zero information about Season 18 specifically.
The provided text contains general information about the series (set in Yorkshire, created by Roy Clarke, runs from 1973 to 2010, 295 episodes total, about three senior citizens unencumbered by responsibilities who speculate about townsfolk and seek adventures).
The prompt says: "If a detail is not in the provided material, you omit it rather than guess."
Since there is no information about Season 18's narrative arc, I cannot write a 160-220 word summary of it without inventing facts, which is strictly forbidden.
The primer requires 4 bullet points about lore/characters/stakes. I can extract general series lore (Yorkshire setting, three senior citizens, unencumbered by responsibilities, seeking adventures), but I cannot provide specific "Season 18" context if it's not there.

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