Major, Carver and Kelly have gone their separate ways. Things are looking up for the AI-enhanced Major, whilst Carver is gunning for a promotion and is knee deep in a new case.
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 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。
The cast reunite to look back over a decade of such fun, friendship, romance and everything that made millions of fans connect with this unique and very special sitcom.
