Unforgotten

Tensions are running high in the third episode of the new series as investigations into David Walker's murder continue. Jason, in particularly, is finding it difficult to process his father's death, asking Cassie to see his Dad's body following his outburst at stepsister Becca.

Meanwhile, Sunny meets James Gregory, David's old school friend who relays what David told him about his abuse at primary school, revealing that David had managed to track down and confront the offending teacher before his death. However, Sunny's conversation with James also uncovers some illuminating aspects of David's lifestyle that may have contributed to his murder.

In Highgate, Cassie meets Marion and Elise's mother, Joy Dunphy, who can't think of any reason why her address would have been written on the travelcard found in David's possessions. Their conversation does come around to Marion, however, which leads to a prickly interview between Cassie and Marion.