Staff and prisoners at HMP Mandrake meet new inmate Lee Kingley (Lennie James), who has been sentenced to ten years for GBH and a firearms offence.

Ronaldo returns to D wing, having recovered from a stabbing and claiming not to remember who attacked him. Patty has been transferred for safety, and Lee is wary of possible reprisals.

Lee's fearsome brother Troy arrives on the wing. Lee is happy to spend time with him, but reluctant to get involved with the drug dealing and money lending that his status immediately affords him.

With his brother Troy 'ghosted', Lee is top dog on the wing. However, his reputation is endangered when a rumour goes round that Kappa, his sidekick, is a paedophile.

Russo receives a tip off that an officer is bringing drugs onto D wing. He orders Nick to lean on a renowned grass, Collit, in order to find out who's responsible.

Female officer DD retaliates when she is assaulted by an angry prisoner, who then makes a complaint against her. She is ordered to go and see Nick for counselling.

Lee returns from segregation noticeably more reserved. Shiel is now top dog and Lee is happy to let him run the wing, until he attempts to sexually harass vulnerable first timer Lucas.

Lee gets a visit from his lawyer and the police. They want him to give evidence against Paul Brown, the policeman who put him inside.