D.C. Webb and D.C.Riley wait outside a cafe, whilst inside D.S. McAllister is conducting a rather clumsy undercover sting on a suspected drug dealer. D.I. Cullen is furious when the suspect is released without charge following McAllister's poor handling of the case. Resentful of D.S. Singh's success in recruiting local informants, McAllister manages to coax some information from solicitor's clerk Jamie Ross, which eventually leads to a successful arrest when Ross's information blows apart a stabbing suspect's alibi. Pleased with her success, McAllister is determined to convince Ross to work as an informant for her.
Meanwhile, Riley meets up with his brother Joe, who seems to be in some trouble with the police in Northampton.
- Natalie Roles as DS Debbie McAllister
- Gary Grant as DC Paul Riley
- Raji James as DS Vik Singh
- Ged Simmons as DI Alex Cullen
- George Rossi as DC Duncan Lennox
- Chris Simmons as DC Mickey Webb
- Andrew Paul as PC Dave Quinnan
- Graham Cole as PC Tony Stamp