Nikki arrives at a murder scene to find it's a carbon copy of a case in her past. She soon fears the killings are personal to her.
| Name | Type | Role | |
|---|---|---|---|
| Ed Whitmore | Writer | ||
| Jonathan Broadbent | Guest Star | Daniel Rowland | |
| Joanna Horton | Guest Star | Suzie Banks | |
| Thomas Coombes | Guest Star | DS Calvin Jones | |
| Sagar Arya | Guest Star | Depak Shah | |
| Dean Andrews | Guest Star | Tony Hamilton | |
| Lily Lovett | Guest Star | Sophia Hadden | |
| Liza Tarbuck | Guest Star | DI Pamela Rankin | |
| David Cann | Guest Star | DI Murray Porter | |
| Sam Strike | Guest Star | David Hamilton | |
| Dean Lennox Kelly | Guest Star | Carmichael | |
| Dan Fredenburgh | Guest Star | Scott King | |
| Ariyon Bakare | Guest Star | Father Anthony Daws | |
| Georgie Glen | Guest Star | Professor Belinda Roach | |
| Geraldine Somerville | Guest Star | Lydia Hamilton | |
| David Drury | Director |