Line of Duty: Series 3

Season overview

Role: Meticulous television and film archivist.
Task: Produce a JSON object for "Line of Duty" Season 3.
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/asterisks/headings. Plain text prose. Output valid JSON only.
Target: Season 3.
Synopsis: After a criminal is shot dead during a police raid, the AC-12 team begins examining the conduct of Sergeant Danny Waldron, leader of an elite unit. Waldron’s loyal team obstructs the investigation, and the truth about the shooting proves more complicated than Arnott and Fleming could ever have imagined.
Source [1]: General info, "If you think catching criminals is tough, try catching police officers."
Source [2]: Created by Jed Mercurio. Stars Martin Compston, Vicky McClure, Adrian Dunbar, Craig Parkinson. British crime drama following elite detectives investigating police corruption.
Source [3]: Created by Jed Mercurio, produced by World Productions for BBC. Started 26 June 2012.
Source [4]: Steve Arnott transferred to AC-12 (anti-corruption unit) after a mistaken shooting during a counter-terrorist operation. Alongside Detective Constable Kate Fleming.
Source [5]: General info.
Overview (Goal: 160-220 words):
The third season of the British crime drama Line of Duty focuses on an investigation conducted by the AC-12 anti-corruption unit. The narrative begins following a police raid in which a criminal is shot dead. This incident prompts the AC-12 team to examine the conduct of Sergeant Danny Waldron, who serves as the leader of an elite unit. As the investigation progresses, the team encounters significant resistance, as Waldron's loyal team works to obstruct the inquiry. The circumstances surrounding the shooting prove to be more complex than investigators Steve Arnott and Kate Fleming initially anticipated. The series, created by Jed Mercurio, follows these elite detectives as they navigate the difficulties of investigating police corruption. While the investigation into Waldron's unit unfolds, the central tension involves uncovering the truth behind the fatal shooting and overcoming the obstacles presented by the officers involved. The season explores the complications inherent in policing the police, a central theme of the drama series which follows the work of the AC-12 unit in their pursuit of accountability within the force.

Word Count Check:
"The third season of the British crime drama Line of Duty focuses on an investigation conducted by the AC-