Unforgotten

Detectives Cassie and Sunny find themselves thrown into another historic murder case with the discovery of a body.

With their victim identified, Cassie and Sunny begin to find out a bit more about David Walker by talking to his ex-wife, DI Tessa Nixon, who reveals he suffered from depression.

Sunny makes further investigations into David Walker's life that suggest he was a troubled man with a number of issues.

Marion jeopardises her marriage by refusing to open up about the past to her husband, Colin is blackmailed even further and the secrets of Sara's past push her family to breaking point.

Cassie turns her attention to Brentford house and the theory that one or more of the suspects may have been abused at the gatherings there.

With the suspects in the murder of David Walker all having either a motive, opportunity or connection to the victim, Cassie and Sunny are left with a massive puzzle to solve.