What is the name of the character Helen Mirren plays on the British TV series "Prime Suspect"?

Helen Mirren was on the British TV series "Prime Suspect" (1991-2006) and was London's ruthlessly intelligent, cranky (especially whilst quitting smoking) Detective Chief Inspector (DCI) Jane Tennison, who was inspired by real-life DCI Jackie Malton. Tennison was a cop who triumphed over sexist colleagues as well as criminals. Tart-tongued, Tennison solved crimes so cleverly that she rose through the ranks of command. In her personal life, she was flawed, an alcoholic, and tormented by higher ranking officers. Yet the officers, even the piggish among the males who she commanded, called her “Guv'nor”.

"Prime Suspect" is a police procedural TV series devised by Lynda La Plante. Playing Jane Tennison, Mirren is one of the first female Detective Chief Inspectors in Greater London's Metropolitan Police Service. Jane rises to the rank of Detective Superintendent while confronting institutionalized sexism within the police force.

The plot of "Prime Suspect" focuses on a no-nonsense female Detective Chief Inspector (DCI) Tennison. Initially, she is an officer in the Metropolitan Police Service at the fictional Southampton Row police station. The series follows her constant battles to prove herself within a male-dominated profession in which many of her colleagues are determined to see her fail, though she has the support of her boss, Detective Chief Superintendent Mike Kernan (John Benfield), and the loyalty of Detective Sergeant Richard Haskons (Richard Hawley).