这部由安吉·哈蒙（Angie Harmon）与萨莎·亚历山大（Sasha Alexander）主演，讲述波士顿一名女警官与一名女法医的工作生活的TNT警匪剧在今年夏季美剧中的表现十分亮眼，收视率名列各基本收费频道回归剧集的榜首。 尽管被调整到每周四晚9点播出，《妙女神探》平均每一集仍吸引到了710万观众。因此，TNT台已经续订了第四季，该季共有15集，将于2013年播出。
In the series opener we meet Nancy Botwin, a recently widowed suburban soccer mom who's dealing pot to make ends meet Nancy flips out when she discovers Josh, one of her competitors, is dealing to 10 year-olds at her youngest son's school, but she soon discovers a bigger skeleton in Josh's closet Nancy is stunned when Quinn, her rival Celia's 15 year old daughter, asks her permission to have sex with her 15 year old son, Silas Celia thinks her Nanny-Cam is the perfect solution to keep the kids celibate, but she ends up seeing much more than she bargained for.
Tom Barnaby joins the Causton Chamber of Commerce trip to Brighton as he is suspicious of dodgy mayor Hicks' plan to buy coastal land on which to buy chalets. Also opposed to the plan is Lady Matilda William,who has had threatening letters, as have the local vicar, oily property developer Hugh Dalgleish and hotelier Jenny Russell. Lady Matilda is descended from Richard of Guillaume,a ruthless contemporary of William the Conqueror,and believes that her son Richard,last of the line and brain-damaged for twenty years,was the victim of ancestral jealousy.In Brighton Dalgleish is murdered with the sword stolen from Guillaume's tomb and Hicks is arrested for fraud. Having learnt how Richard came by his accident Barnaby is convinced that Richard and not the property scam is the cause of yet another victim being claimed by the sword of Guillaume.
Mick Taylor sees a lifetime opportunity after a chance encounter with a coach full of international tourists.
