With the guilt of what he has done weighing heavily on his mind, PC Des Taviner admits to Sgt. Sheelagh Murphy his part in the Sun Hill fire which killed six of his colleagues. To his horror, Murphy demands he turn himself in or she will do it for him. Instead, she calls her husband Patrick and admits her affair, saying she is leaving him for Des. Alan Best tells Insp. Gina Gold that a big heroin deal is about to go down at the garage where he works, so CID set up an obbo. They don't count on PC Gary Best turning up at the garage in full uniform and a panda car to apologise to his dad for assaulting him. When the dealer pulls a gun, DS McAllister calls for a Trojan unit, but when the gunman takes aim at Gary, his dad offers himself as a hostage in his place. PC Taviner becomes obsessed with finding a mugger responsible for the death of an elderly woman who dies of shock after her husband is stabbed. Hearing that Sgt. Murphy has gone to Scotland Yard, and that Supt. Okaro wants to see h