The deadly threat posed to Rose by Reeks forces Morgan to take matters into his own hands, setting him on a collision course with Leigh. Meanwhile, Rose tries to get close to prisoner Louis Acosta.

A hostage situation develops on C Wing. Can Leigh and Rose save themselves and the prison?

As Long Marsh comes under the spotlight, life on the tense and paranoid C Wing is altered forever - and everyone is a suspect

The shocking truth about Katy Trent's killer finally comes out

Prison officer Leigh lives for her job at Long Marsh men's prison. But when mouthy young Rose arrives, fresh out of training, C Wing will never be the same again.

Will Leigh cross the line between officer and criminal? Rose carries out a dangerous mission, and finds herself trapped in a potentially deadly double bind.

Leigh becomes increasingly isolated from her sceptical colleagues. A guilt-ridden Rose takes a chance to make amends. Toby's suspicions lead him to his own investigations.

With C Wing on lockdown, the prisoners' mental health reaches crisis point in an under-resourced and chaotic system. Meanwhile, Rose sees an opportunity, and Toby threatens to escalate his suspicions.