Episode 4

Eve and the team are called to a women's prison to carry out tests on the body of an inmate, Beth Fox. The body has been found badly bruised, injuries which would indicate that she has been beaten to death. However, Eve suspects something even more sinister has happened here.

Following the discovery of the body, a serious riot has broken out, which makes it difficult for the team as they try to gather evidence. Panic in the prison continues to spread, and Eve is under great pressure to discover what happened to Beth before the press get involved.

As they investigate further, Oggy becomes obsessed with one inmate in particular and Hale realises that an escaped prisoner could be a serious danger to the public. The team are frustrated as each one of their theories is proved wrong until, finally, Eve makes a truly shocking scientific discovery which throws the Home Office into a panic and catapults the team into a frantic race against time.