Luke finds himself banged up in a Young Offender institution with his girlfriend's nightmare brother Jason. Can Luke survive his first day behind bars without strangling Jason or being strangled himself?

Luke tries to impress his girlfriend by taking up an A-level. Unfortunately, neither the subject nor the teacher turn out to be quite what Luke is expecting. Meanwhile, prison bully Marcel is suspicious that Luke has been trying to get out of reading him the Twilight Saga. Guest-starring Sylvester McCoy (Doctor Who, The Hobbit).

Luke makes the dramatic decision to propose to Gemma, in an attempt to send her new mate Roger a clear message. The only slight obstacle to overcome will be getting her parents’ permission. Meanwhile, Isaac struggles to go cold turkey on snitching.

When an inmate escapes, prison psychopath Marcel instructs Luke to work out how he did it – otherwise Luke will find himself burnt alive. Meanwhile, Prison Governor Riley is on the warpath and Creg is in the firing line.

When Dawn announces that the young offenders are to stage a Musical for their friends and family, Luke spots an opportunity to save his relationship with Gemma. Meanwhile, Creg is distressed to learn that Dawn is a lesbian and Jason sets up a piercing business.

Series finale. Luke becomes the prison hero when Jason nominates him for a dangerous raid on the warden’s office. Meanwhile, when nineteen ounces of confiscated weed go missing on his watch, Creg must find a way to replace it before Dawn finds out.