EXO's Travel the World on a Ladder: Season 4

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "EXO's Travel the World on a Ladder" Season 4.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
No invented titles, names, dates, etc.
Omit missing details.
Write original, neutral, encyclopedic prose.
No markdown, no asterisks, no headings, no bullet points in the text.
Output valid JSON only.
JSON Keys:
overview: Factual 160-220 word summary of this season's narrative arc.
primer: Array of exactly 4 concise bullet points summarizing essential previous lore, character positions, and stakes.
TMDB Season Synopsis: "The EXO members take on their journey to Geoje and Tongyeong with the extraordinary ladder!"
Source [1]: Reality show where they travel around the world and use a ladder to help their decisions.
Source [2]: Mentions an "upcoming season" with Suho, Chanyeol, D.O., Kai, and Sehun traveling to Jeju Island. (Note: This doesn't explicitly say it's Season 4, but the prompt asks for Season 4 based on the provided synopsis).
Source [3]: Stars Xiumin, Baekhyun, and Chen. Reality show where they travel around the world and use a ladder to help their decisions.
Source [4]: Mentions Do Kyung-soo, Kai, Byun Baekhyun in Kaohsiung&Kenting.
Source [5]: Cast includes Suho, Xiumin, and Doh Kyung-soo.
Season 4 Narrative Arc (from TMDB Season Synopsis): The EXO members embark on a journey to Geoje and Tongyeong. They utilize an extraordinary ladder during this journey.
Word Count Check for Overview: The synopsis provided is very short: "The EXO members take on their journey to Geoje and Tongyeong with the extraordinary ladder!" This is only 16 words. The prompt requires 160-220 words.
Problem: I cannot invent details to meet the word count requirement. If the provided text is insufficient to reach 160 words without inventing facts, I must follow the instruction "If a detail is not in the provided material, you omit it rather than guess." However, the prompt demands a 160-220 word summary. This is a conflict.
Strict Adherence: