The men and women of bomb disposal unit Bluestone 42 are back in this poignant comedy. Our favourite soldiers are preparing to leave Afghanistan, but the risks are ever present – as are the pranks and wind-ups. Battered and bleeding after their vehicle was rocked by an IED at the end of Series 2, they come under attack as they try to get back to base, so Nick and Towerblock must work together on multiple devices under heavy fire. And with just weeks to go before they return to the UK, the team has to deal with a shocking injury to one of their own and find themselves resenting changes brought in by new boss Elen – until she discovers a unique way to win them over.