Full-series spoilers
Follow Simon’s disappearance and return, the changing Kingdom household, Peter’s family history and the recurring cases that give the series its shape.
The timeline follows original broadcast order. Each entry links to its episode guide, where the case and family story are set out together.
The unexpected call overturns the assumption that Simon’s disappearance can be treated as closed.
Peter’s search links Simon to a deceased client, regular payments and the Waller family.
Gambling debts, attempted repayments and cash hidden in the office steadily raise the cost of Simon’s return.
Honor’s arrival changes the family story; Daniel and Lyle’s feelings create consequences beyond Simon himself.
Cambridge connects Peter’s education, former tutor and later investigation into missing research.
The eviction case helps turn a possible London departure into a deeper commitment to the town and its clients.
Road plans, a lighthouse, compulsory purchase, a golf course, allotments and river pollution repeat the tension between development and belonging.
His collapse leads to a diabetes diagnosis and then the final revelation that reopens the meaning of the Kingdom family.
Establishes Simon’s disappearance, Beatrice’s return from rehabilitation and the telephone call that proves the mystery is not settled.
The trace on Simon’s telephone introduces Christopher Waller and turns a private disappearance into a larger investigation.
Peter follows Simon’s financial trail to Christopher Waller’s parents and the payments they received.
Peter learns that Simon approached his former Cambridge tutor for money shortly before disappearing.
Peter pays Simon’s gambling debts but discovers that the threat surrounding the family may continue.
Honor arrives pregnant and identifies Simon as the father, changing the Kingdom family story at the close of the series.
Honor and Daniel have become part of Peter’s household, Beatrice learns she is pregnant, and Simon’s return overturns the family’s fragile stability.
Simon conceals cash in the office, Beatrice leaves before giving birth, and the police discover that Simon is alive.
Simon’s bail threatens the practice, Honor leaves and Lyle uses the hidden money to secure Simon’s release.
Simon returns to the practice and begins an affair with the cricketer’s wife, deepening the damage caused by his return.
Working together exposes the brothers’ different instincts while Simon’s danger remains unresolved.
Simon says the hidden money belonged to their father, drives into the storm and is later found dead on the beach.
The opening episode re-establishes the practice after Simon’s death and begins the final series’ concern with duty and identity.
Lyle meets Emily, and professional rivalry begins to turn into personal interest.
Beatrice’s attempt to fund Petra’s schooling brings Petra’s father back into the story.
Beatrice becomes part of Peter’s investigation, and both cases test appearances against underlying motives.
Lyle’s family background moves to the foreground, while Peter’s worsening health ends in collapse.
Peter is diagnosed with diabetes and discovers that he and his younger siblings did not share the same father.
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