Whatever secret Leigh is hiding lies within the forged information on her birth certificate - but whether she will cross the line between officer and criminal and hand it over to Governor Ray remains to be seen. With some of the wing's residents trying dangerous new ways to get high, a prisoner story exploring the radicalisation of a young mind leads Ali to remind Leigh how big a difference she and her team can make to the lives of the inmates - and just how badly she needs to stay on C Wing.

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.