Summary Murray's tape shows Piers and three others attacking a nuclear convoy,resulting in a policeman's death and the team believe initially that the government killed Piers in revenge. However Eve,released from custody,discovers that Piers had a terminal bone marrow disease and,knowing this,had actually joined the peace movement to discredit it with violence. Murray confronts Lucy,who,along with Hugo,Piers and himself,comprised the attackers but she is murdered and Murray set up for her death. Boyd takes him into the team's protection and they learn who tipped off the quartet about the convoy and would want the attackers silenced. Another death follows before Piers' killer is exposed and Grace almost dies in the process,leading Sarah to tell ACC Smith that she has doubts as to Boyd's fitness to lead his team.

• Crime
• Police Procedural
• Drama
• Mystery