Snowpiercer: Season 2

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Snowpiercer" Season 2.
Constraints:
Use ONLY provided SYNOPSIS and SOURCES.
No invented titles, names, dates, etc.
No markdown, no asterisks, no headings, no bullet points (within the text).
Output: Valid JSON only.
Keys: overview (160-220 words), primer (array of exactly 4 concise bullet points).
overview content: Factual summary of the season's narrative arc.
primer content: Essential previous lore, character positions, and stakes.
TMDB Season Synopsis: Season 2 features a new power struggle. People are divided between loyalty to Layton and Mr. Wilford. Mr. Wilford has a new train, new technology, and a game plan. Layton battles Wilford for the soul of Snowpiercer. Melanie leads a charge on a shocking new discovery that could change the fate of humanity.
Source 1 (TMDB): World became a frozen wasteland more than seven years ago.
Source 2 (Wikipedia): American post-apocalyptic dystopian thriller. Based on 2013 film and 1982 graphic novel.
Source 3 (IMDb): Created by Josh Friedman, Graeme Manson. Cast: Daveed Diggs, Mickey Sumner, Alison Wright, Iddo Goldberg. Seven years after the world became a frozen wasteland, remnants of humanity inhabit a perpetually-moving train circling the globe. Themes: class warfare, social injustice, politics of survival.
Source 4 (TMDB Cast/Crew): Remnants of humanity inhabit a gigantic, perpetually-moving train circling the globe. Class warfare, social injustice, and politics of survival.
Source 5 (Disney+): Set more than seven years after the world has become a frozen wasteland.
Overview:
Season two of Snowpiercer introduces an entirely new power struggle that creates a dangerous rift among the inhabitants. The population finds itself divided by conflicting loyalties, with some supporting Layton and others remaining loyal to Mr. Wilford. This conflict is intensified by the fact that Mr. Wilford possesses a new train, new technology, and a strategic game plan that keeps the characters guessing. As Layton engages in a battle against Wilford for the soul of Snowpiercer, Melanie takes a leadership role in pursuing a shocking new discovery. This discovery carries the potential to change the ultimate fate of humanity. The series is set in a world that became a frozen wasteland more than seven years prior