PeterBoyd探长指挥着一支经过多种训练的警探和科学家的警察队伍-悬案小组，使用现代的方法和原来调查时还没有的新科技来专门调查的未破获的老谋杀案。Det.Supt.PeterBoyd(playedbyTrevorEve)istheleaderofamulti-disciplinepoliceteamofdetectivesandscientists,theColdCaseSquad,whichinvestigatesold,unsolvedmurdercasesusingmodernmethodsandnewtechnologythatmaynothavebeenavailableduringtheoriginalinvestigation.LedbyDetectiveSuperintendentPeterBoyd(TrevorEve)theColdCaseSquadinvestigatesseriouscrimeswhichhavegoneunsolved.Armedwiththelatesttechnologicaladvancesandoldfashionedhardwork,PsychologicalProfilerGraceFoley(SueJohnston),ForensicPathologistFrankieWharton(HollyAird),DetectiveConstableMelSilver(ClaireGoose)andDetectiveSergeantSpencerJordan(WilJohnson)wakethedeadforcluesandanswers.