Unforgotten: Season 5

Season overview

Task: Write a JSON object for "Unforgotten" Season 5.
Keys: overview (160-220 words) and primer (array of exactly 4 concise bullet points).
Constraints: Use ONLY provided synopsis and sources. No invented facts (titles, names, dates, etc.). No markdown, no asterisks, no headings, no bullet points in the prose. Output valid JSON only.
Source Material:
TMDB Synopsis: Jessica James succeeds Cassie Stuart as DCI (after two interim leaders). Detectives investigate an unsolved murder from 39 years ago. Bones found under a demolished house. Four main suspects emerge.
Source [1]: London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons.
Source [3]: British crime drama, aired on ITV on 8 October 2015, created/written by Chris Lang, directed by Andy Wilson.
Source [4/5]: Cast includes Sanjeev Bhaskar, Carolina Main, Jordan Long, Nicola Walker, Sinéad Keenan, Peter Egan.
Overview:
Jessica James has taken over the role of DCI, succeeding Cassie Stuart following two interim leaders. The modern police team is tasked with investigating an unsolved murder that took place 39 years ago. The investigation begins after the bones of a victim are discovered beneath the ground of a demolished house. This discovery prompts the detectives to unearth a history that has remained buried for decades. As the case progresses, four main suspects emerge from the investigation. The detectives work to unravel the dark pasts of these individuals to find the truth behind the events of the crime. This British crime drama series, which initially aired on ITV in 2015, follows London police detectives as they investigate historic cold cases involving missing persons. The narrative focuses on the process of uncovering long-hidden secrets through the examination of forensic evidence and the interrogation of those connected to the original incident. By exploring the lives of the suspects, the team aims to finally reveal the truth that has been hidden for nearly four decades.
Word Count Check (Overview):
"Jessica James has taken over the role of DCI, succeeding Cassie Stuart following two interim leaders. The modern police team is tasked with investigating an unsolved murder that took place 39 years ago. The investigation begins after the bones of a victim are discovered beneath the ground of a demolished house. This discovery prompts the detectives to unearth a history that has remained buried for decades. As the case progresses, four main suspects emerge from the investigation. The detectives work to unravel the dark pasts of these individuals to find the truth behind the events of the crime. This British crime drama series, which initially aired on ITV in 2015