DNA evidence linked to the Health Secretary’s assassination forces Nikki to face her past in the present. As her investigation progresses, Nikki realises that its consequences will affect her, and her profession, forever.
| Name | Type | Role | |
|---|---|---|---|
| Ed Whitmore | Writer | ||
| Gediminas Adomaitis | Guest Star | Andrei Karpov | |
| Matthew Gravelle | Guest Star | Tom Faulkner | |
| Gina Bramhill | Guest Star | Fiona Mashaba | |
| David Leon | Guest Star | Oscar Harris | |
| Jacqueline Oceane | Guest Star | Assassin 1 | |
| Tom Benedict Knight | Guest Star | Dan Clemence | |
| Diane Axford | Guest Star | Mary Butcher | |
| Will Bowden | Guest Star | Assassin 2 | |
| Emma Beattie | Guest Star | Alice Reynolds | |
| Vera Horton | Guest Star | Sonia Karpov | |
| Hugh Quarshie | Guest Star | Jomo Mashaba | |
| Shireen Farkhoy | Guest Star | DS Martine Chalal | |
| Lloyd Everitt | Guest Star | David Mashaba | |
| Bill Anderson | Director |