Prime Suspect (1991) 
 
 

 Stars: Helen Mirren, John Benfield, Tom Bell 
 
 
 
A female police detective investigates a series of serial murders while dealing with sexist hostility from her male comrades.
 
 
 D.C.I. Tennison seizes the opportunity to head a murder investigation--something she should have done long ago, had she not been passed over by her male superiors time and again. With a suspect already identified and her own team openly hostile, she uncovers errors and conflicting facts that point to a cover-up within the force. Is this a single murder or the latest act of a serial killer? Tennison refuses to back off the investigation
 
 
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http://www.imdb.com/title/tt0098898