ITV称第三季将于2017年2月27日（英国时间）回归，且会有一些新角色加入，并且第三季将是最终季。
　　第三季中Hardy警长和Miller警长再次联手，而Danny之死似乎永远也无法划下句号。作为最终季，第三季将关注于这一事件给涉及到的每个人带来的情感伤害，以及对友谊、亲情不可挽回的损伤。

At the start of high school, Piper, Sophie, Isabella and Honor think they will be best friends forever, so they sink a time capsule in the lake with a list of things they want to do before graduation. By senior year, they have gone their separate ways. Piper has turned into the class clown, party girl who never passes up a drink. Sophie pledges to stay a virgin until she is married and has created a purity app. Isabella is the feminist femme fatale who's the editor of a zine. And Honor is the pride and joy of the community. Her dream of being a professional ballerina is taking off. But when tragedy strikes, the former BFFs must reunite, break open the capsule and complete the pre-graduation bucket list.