Chicago Fire: Season 9

Season overview

Task: Write a JSON object for "Chicago Fire" Season 9.
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 prose. Neutral, encyclopedic prose.
Output format: Valid JSON only.
TMDB Season Synopsis: A global pandemic adds pressure to an already demanding job. With protocols shifting and stakes higher than ever, the team adapts while still putting everything on the line.
Source [1] (TMDB): General overview: "An edge-of-your-seat view into the lives of everyday heroes committed to one of America's noblest professions."
Source [2] (IMDb): Created by Michael Brandt, Derek Haas. Cast: Taylor Kinney, Christian Stolte, Joe Minoso, David Eigenberg. Follows professional and personal lives of firefighters, rescue personnel, and paramedics of Chicago Fire Department at fictional Firehouse 51.
Source [3] (TMDB Cast & Crew): Firefighters, rescue squad, and paramedics of Chicago Firehouse 51. Occupation is stressful, dangerous, rewarding, and exhilarating.
Source [5] (Wikipedia): American procedural drama series broadcast by NBC. Created by Derek Haas and Michael Brandt. First installment of the Chicago franchise.
Overview (Target: 160-220 words):
The ninth season of the American procedural drama series Chicago Fire, which is the first installment of the Chicago franchise, focuses on the firefighters, rescue squad, and paramedics of the fictional Firehouse 51. Created by Derek Haas and Michael Brandt, the series follows both the professional and personal lives of these individuals as they perform their duties within the Chicago Fire Department. During this season, a global pandemic introduces additional pressure to an already demanding profession. As the team works to save lives, they must adapt to shifting protocols while facing stakes that are higher than ever before. The members of Firehouse 51 are part of an elite group of courageous men and women engaged in one of America's noblest professions, a job that is described as stressful, dangerous, rewarding, and exhilarating. As they put everything on the line, the characters navigate the complexities of their roles amidst the challenges presented by the pandemic. The series continues to provide an edge-of-your-seat view into the lives of these everyday heroes as they risk their lives in their service to the community.

Word count check:
1. The (1)
2. ninth (2)
3. season (