8 episodesFirst aired 19 October 2023
Four detectives. Four timelines. One body. To save Britain's future, they'll need to solve the murder that altered the course of history first.
E1Oct 202355m
In 2023, Detective Hasan discovers a dead body in Longharvest Lane, Whitechapel — while in 1941 and 1890, two other detectives find the same corpse.
E2Oct 202355m
Hasan follows new leads in the present. As Hillinghead reluctantly closes his case, Whiteman goes to desperate lengths to hide involvement in his own.
E3Oct 202357m
Connections between the cases start to come into focus. Whiteman encounters an unexpected complication; Hillinghead attends a séance.
E4Oct 202356m
Hasan discovers she isn't the only detective investigating a murder on Longharvest Lane. In the past and future alike, relationships start to deepen.
E5Oct 202357m
The past, present and future collide as a set of fingerprints from 1890 are found in 2023. Maplewood uncovers the Commander's true identity.
E6Oct 202355m
On the day of the explosion, Hasan does everything in her power to help Elias make a life-altering choice. The others wrestle with their consciences.
E7Oct 202359m
Elias finally knows what it means to be loved. He creates the family he's always wanted — but Hillinghead has to suffer for it.
E8Oct 20231h 1m
Across decades, the detectives work together to stop Elias from reshaping history. Will words be enough to break the loop and save thousands of lives?