The stress of civilian life causes Taffy to crack up with frightening consequences. Dillon and Steve get a new job.

Frank and his team of ex-paras go to Scotland to tackle salmon poachers. When they arrive, they find that security is being dealt with by another ex-para, Tony Malone, the soldier whom Frank blames for the bomb explosion which killed six of his young recruits in Belfast.

Frank is stunned by the suicide of his military buddy Steve. The ex-paras form a company, Stag Security Car Hire. They are contracted to do a job for local gangster Barry Newman. Tensions mount between Frank and Jimmy.

Frank, increasingly tortured by his past in Northern Ireland, finds himself an accomplice to a crime.

Frank, Harry and Cliff are arrested and accused of a crime they didn't commit in the final episode