Waterloo Road: Series 4

Season overview

Topic: Waterloo Road Season 4.
Constraint 1: Use ONLY provided SYNOPSIS and SOURCES.
Constraint 2: Output ONLY valid JSON.
Constraint 3: No markdown, no asterisks, no headings, no bullet points in the text.
Constraint 4: overview must be a factual 160-220 word summary of this season's narrative arc.
Constraint 5: primer must be an array of exactly 4 concise bullet points summarizing essential previous lore, character positions, and stakes.
Constraint 6: Do not invent details. If not in the material, omit.
Source [1]: Series set in a comprehensive school of the same name. First broadcast on BBC One on 9 March 2006.
Source [2]: Series to end in 2015. Will not return after its 10th series.
Source [3]: First shown in 2006. Chaotic secondary-school saga.
Source [4]: Broadcast date 2006.03.09.
Source [5]: Professional and personal lives of students and staff of a failing comprehensive school.
TMDB Synopsis: Drama series set in a failing secondary school.
The user asks for a summary of Season 4.
Looking at the sources:
Source [1] mentions the series started in 2006.
Source [2] mentions it ends after the 10th series.
Source [3] mentions it was first shown in 2006.
Source [5] describes the general premise (failing comprehensive school, lives of students and staff).
Problem: None of the sources provide any information about the specific plot, characters, or narrative arc of Season 4.
Since I must only use provided information and I cannot invent details, I cannot write a 160-220 word summary of Season 4's narrative arc because the sources do not contain it.
Similarly, I cannot provide a primer of 4 bullet points about previous lore/characters because the sources do not contain character names (other than mentioning Jodie Comer and Jenna as talent from the series generally, but not as characters in the lore) or specific stakes/positions.
The prompt says: "If a detail is not in the provided material, you omit it rather than guess."
The prompt says: "Write ONLY verifiable facts that are explicitly supported by the provided SYNOPSIS and SOURCES