DS Sam Nixon and DS Debbie McAllister investigate when the stolen digger turns up at a transport site. DI Neil Manson's suspicions are proven correct, but nobody else knows that Manson's tip-offs are coming from Don Beech. The arrival of DI Peter Cavanaugh, an Australian cop on attachment to the NCIS, sets hearts a-flutter, but DCI Jack Meadows is furious when DI Manson's liaisons with Beech are revealed. New PC Lance Powell arrests a black teenager on suspicion of shoplifting, but cops a warning from Supt Adam Okaro to tread more carefully with the black community in future. An angry Powell is fair game for DC Rob Thatcher and undercover journalist PC Andrea Dunbar, who are both seeking to prove that Okaro has it in for his black officers. PC Gary Best is stunned when Powell tells him he's gay.

DS Phil Hunter is desperate to find his daughter Madison, who has been abducted by Dennis Weaver. DCI Jack Meadows orders him not to get involved in the investigation, and assigns DS Samantha Nixon to keep an eye on Hunter. Hunter and Nixon investigate when a kilo of cocaine is found in a car after a chase with police, and find the driver Sonny Jonson at the hospital. PC Yvonne Hemmingway arrests a 17-year old girl, Shirley Moss, on shoplifiting charges and forms a bond with the girl when Shirley tells her she's pregnant. Hemmingway convinces the shopkeeper to drop the charges, and when the father of Shirley's child turns out to be big-time drug dealer Rifkin, Hunter and Nixon organise an SO19 raid on Rifkin's flat, but with drug courier Sonny and Shirley both in police custody, Rifkin clearly has his bases covered. PC Gary Best is surprised when the SO19 sergeant at the raid turns out to be PC Lance Powell's partner, Mark Rollins. Yvonne offers Shirley a place to stay at her flat, but

DC Rob Thatcher is keeping a close eye on the Radfords despite the warnings of his colleagues. He eagerly arrests David Radford for selling bootleg DVDs on the Coal Lane Estate, but when David's mother Irene turns up with a proof of purchase, Thatcher knows he's been set up by his nemesis. DS Phil Hunter in running the CSU, and despite DC Jim Carver's misgivings, Hunter's forceful manner gets results when he convinces a reluctant pregnant domestic violence victim to testify. When a casino punter is mugged after a large win, Carver organises an undercover operation with PCs Cameron Tait and Honey Harman. Carver wins big on the tables, and sure enough, is mugged as he gets home. The team manage to crack the case when they realise the connection between one of the croupiers and a cab driver, but has Carver's big win tipped his addictive personality back into overdrive? Despite being on leave, PC Kerry Young returns to the station to declare her love to Cameron, but after being taunted by