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

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

Morgan takes matters into his own hands to protect Rose from Reeks

Rose faces a terrifying decision. C Wing is plunged into chaos by a strike.

Leigh begins to doubt her team's loyalties when she discovers the identity of the undercover police officer. Meanwhile, Rose worries about her safety when it turns out that new arrival and double murderer Tyler Reeks has links to fellow prisoner Louis. 

The officers at Long Marsh are determined to make a fresh start but rumours of an undercover police officer on C wing threaten their plan and weeding out the officer is anything but straightforward.