Stella continues to monitor the killer, whilst Burns visits a disgraced paedophile priest (Sean McGinley) who may have had contact with the suspect. Ferrington is shot whilst responding to a call out of a man matching the description of the suspect who has been taken hostage, blowing Gibson's arrest strategies.
Meanwhile, whilst Katie works to destroy evidence, Hagstrom (Kelly Gough) heads a team to intercept and arrest her, Martin and McNally arrest Sally Ann for perverting the course of justice, whilst Anderson arrests Spector for the abduction of Rose Stagg, among other crimes.
Stella monitors the progress of the interviews from behind the scenes, whilst she is informed of a video that shows Rose pleading for her life, with the suspects face clearly on camera. The search team discover Spector's burnt car with conflicting evidence inside it.