Under pressure to charge her prime suspect, Maggie's still not convinced they've found the killer. However, she's taken aback to discover that her stalker had close links to the Reid family. Meanwhile, Theresa's return pushes Claire and Daniel's marriage to breaking point and Luke is shaken by the reappearance of a teenage neighbour, who seems intent on making amends for the past. As pressure grows to go public with the arrest, Maggie finds herself increasingly isolated at work and home as she confronts the reality that her son isn't like the other children in his class. When her suspect reveals information that only the killer could have known, Maggie has no choice but to charge them. But when a conflicted Teresa reignites Maggie’s suspicions about Daniel, Maggie begins to piece together Callum’s final hours, finding her instinct as a mother at war with her desire to solve the crime, as she comes to understand that that death isn't always the hardest loss to bear. Then a brutal death effectively closes the case and Maggie faces a stark choice – will she protect her career or expose the truth? As the final pieces of the puzzle fall into place, we finally learn how and why Callum Reid died and how a terrible misunderstanding spiralled into a lie that destroyed a whole community.

• Debbie O'Malley

• Darren Boyd
• Tamsin Greig
• Tom Beard