The series focuses on a no-nonsense female Detective Chief Inspector (DCI), Jane Tennison (played by Helen Mirren), who is attached to the Metropolitan Police, initially at the fictional Southampton Row police station. It is set mostly in London and the outer areas, with series 5 being set in Manchester. In later series, she is promoted to Detective Superintendent and reassigned to rotating duties, beginning with the vice squad in Soho. The series shows how she survives and negotiates in a male-dominated profession determined to see her fail with the support of her boss, Detective Chief Superintendent Mike Kernan and loyal Sgt. Richard Haskons. As mentioned in the behind-the-scenes documentary that accompanies "The Final Act" DVD, Jackie Malton, who was one of only four female DCIs at the time this series began, acted as an advisor to the writers.