Episode list

Despite his professional heroics, DI John Keenan has to face facts about his marriage. With a dangerous paedophile on the loose, probationer Lucy Slater has a baptism of fire at Holby South.

DI Keenan has long had his sights set on arresting Neculai Stenga, a local Russian mobster who is heavily into the drugs and prostitution trade. Up to now, Keenan has been unable to get the evidence to nail him but things may have changed. Stenga's girlfriend, Louise Martin, approaches PC William Jackson, whom she grew up with, to tell him that Stenga may have been responsible for the recent death of a prostitute who was thrown from a third story window. She's also ready to testify, even though she knows that Stenga will not hesitate to kill her if he finds out what she has done. On the street, the police are on the lookout for a gang of 5 hoodies who have been mugging anyone with earphones. PCs Clifton and Slater arrest a young lad, Adam Tyler, out joyriding in a stolen car. Keenan's personal life becomes ever more complicated now that he's sleeping with Rachel Barker and his wife, who had asked him for a divorce, is sending different signals.

With the information on the incoming shipment of crystal meth, the police finally manage to get the green light to stage a raid and arrest Neculai Stenga in the act. It all goes wrong however and it's obvious that Stenga has set them up. While most think their informant was involved in the set-up, Keenan posits another theory. Having located the storage site for a robbery ring, PC Kelly Cooper gives into temptation. PC Lucy Slater and Sgt. Macfadden are attacked by a disturbed man who takes them prisoner. Keenan's personal life is upside down when Rachel Barker makes a point of telling his wife Kate they slept together. With Kate starting her new job at the station, it makes for a difficult work atmosphere. DS French's wife comes to the station with bad news.

The police are looking for Steven Price, the informant who was supposed to set up Nekolai Stenga for a drug bust. DS Luke French thinks that Price is probably dead but few agree with him, including DI Keenan. What they don't know is that there is a mole in the police force who tipped Stenga off about the raid. The mole is also out to find out in which safe house Keenan has put Stenga's girlfriend, Louise, another possible witness against the mobster. The police arrest Vinnie Dwyer, a house burglar who takes his infant nephew with him while out on the job. It turns out that the baby's mother, Anne-Marie Dwyer, and PC Robert Clifton have a considerable history together. Dwyer however also has some important information - he tells French there's a grass on the Force. Clifton also arrests a young woman who turns out to be a drug mule. Kate tell her husband, DI Keenan, that he's becoming infatuated with his case and shutting everything - and everyone - out.

The investigation of Stenger continues and DI Keenan focuses on trying to find the mobster's ex-girlfriend Louise. She fled the police safe-house having lost faith in their ability to keep her safe after Stenger paid her a visit. Keenan begins to believe that Stenger is getting information from inside the station and that they have a bent copper on their hands; he shares that view with DCI Harry Hutchinson who sets his sights on PC William Jackson. PC Lucy Slater returns to work after her stay in hospital.The police participate in Operation Spider, the massive roundup of a suspected pedophile ring. Inspector Jenny Black's husband is one of those arrested but it turns out it's Jenny who has a secret. PCs Kelly Cooper and Neil Parker look into the case of a homeless man who is found badly beaten. It turns out he is married but has been living on the street since leaving his wife. Additional information indicates that his wife has hatched a scheme to make some money.

DI Keenan and DS French continue their investigation into Stenga. They get a lead on locating Michael Martin who helped his sister, Stenga's girlfriend, get away from both the hoodlum and police protection. A well-respected solicitor Amina Akran has acid thrown in her face. The police initially suspect the girl's father who had disowned her after she became involved with someone he didn't approve of. PC Lucy Slater has a new boyfriend and is over the moon but PC Robert Clifton recognizes him as a drug dealer. Neil Parker gets the job in CID both he and Kelly Cooper applied for.

PC Robert Clifton is in hospital recovering from his recent encounter with a murder suspect - who poured boiling water on his genitals. DS Luke French decides that his elderly mother will have to be put into a home. Two women show up at the station with one claiming the other's daughter has stolen her baby. PC William Jackson decides to return to work after having resigned when accused of being a bent copper. When DCI Hutchinson gets a call telling him that a local mobster - and chief rival to Nicolei Stenga - is getting a major drugs shipment, DI Keenan smells a rat. He subsequently learns that Harry's superior knows nothing of a possible intelligence leak in the Station. The police have a strange case of one man beating up the other but neither will satisfactorily explain what is going on.

Now that DI Keenan knows the identity of the policeman on Stenga's payroll, he has to decide what to do about it. He tells DS French what he knows, but decides to give the dirty copper a chance to make amends. The mole double crosses him and soon Stenga has taken Keenan's wife and children hostage. Meanwhile, there has been a rash of break-ins at electronics stores recently and the police focus on an ex-con who's just been released from prison. An elderly woman comes to he station however, telling them she is hearing voices telling where the next robbery is going to be. Most of those involved think she's batty but it turns out there is a very good - and reliable - explanation