One victim, found dead on a London street. Four detectives, in four different time periods, must solve the mystery to protect Britain's future.
Episode 1
In 2023, Detective Hasan discovers a dead body in Longharvest Lane, Whitechapel — while in 1941 and 1890, two other detectives find the same corpse.
Episode 2
Hasan follows new leads in the present. As Hillinghead reluctantly closes his case, Whiteman goes to desperate lengths to hide involvement in his own.
Episode 3
Connections between the cases start to come into focus. Whiteman encounters an unexpected complication; Hillinghead attends a séance.
Episode 4
Hasan discovers she isn't the only detective investigating a murder on Longharvest Lane. In the past and future alike, relationships start to deepen.
Episode 5
The past, present and future collide as a set of fingerprints from 1890 are found in 2023. Maplewood uncovers the Commander's true identity.
Episode 6
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.
Episode 7
Elias finally knows what it means to be loved. He creates the family he's always wanted — but Hillinghead has to suffer for it.
Episode 8
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?
