在这部探案新窍门 第三季剧情/喜剧/犯罪片中,BBC的关于大都会警察局“悬疑旧案”部门的喜剧。小组的头是女DS桑德拉普尔曼，既然是和旧事有关，索性就招聘了3个退休侦探：杰克把死去的爱妻埋在后院每天和她聊天，盖里年轻时有名的花心如今要和三个前妻四个女儿共进晚餐，布莱恩是个强迫症、前酒徒和阴谋论者。标题取自一句老话：“You can't teach meijubar.net an old dog new tricks（老家伙学不来新窍门）”。这帮老家伙却成功地在新时代用他们的经验和技，那些疑难案件正中了看似过时的老窍门的道。
DS Pullman decides to reopen one of her old cases involving the death of Nancy Murray in a car crash. Pullman is convinced that Nancy's husband, Stephen, introduced a mechanical fault and was out to get his wife because of an alleged affair she was having. Jack thinks the threats must have come from another woman, while Gerry thinks that she died for a simple reason: she was a woman driver. The team learns that Nancy was seeing a male prostitute twice weekly, and blackmail becomes a real possibility. The solution to the murder, however, is to be found by examining basic human needs and emotions.
