6/6 Luke becomes the prison hero when Jason nominates him for a dangerous raid.
5/6 Luke spots an opportunity to save his relationship with Gemma via a musical.
4/6 When an inmate escapes, prison psychopath Marcel instructs Luke to work out how he did it.
3/6 Luke decides to propose to Gemma in an attempt to send Roger a clear message.
2/6 Luke tries to impress his girlfriend by taking up an A-level.
1/6 Can Luke survive his first day behind bars?
2/6 DI Sleet enlists the help of Radio One DJ Greg James to solve the latest murder.
6/6 As the team prepare to leave Afghanistan for good, Simon receives some devastating news.
5/6 Ellen has to learn to bend the rules, while Mac and Rocket do gladiatorial combat.
4/6 The team suffer a Taliban attack, which distracts Ellen and Bird from their bickering.