| | | | Part 1 |
| 1 | Joyce | Meadowcroft | Elizabeth's best friend. Former nurse. |
| | Ron | | Ibrahim's best friend. |
| | Ibrahim | Arif | Elizabeth's friend. |
| | Elizabeth | Best | Protagonist. |
| | Marcus | Carmichael | Elizabeth's old imaginary friend. |
| | Poppy | | Waitress. |
| 2 | Chris | Hudson | Detective chief inspector. |
| | Donna | de Freitas | Police constable. |
| | Patrice | de Freitas | Donna's mother. |
| | Connie | Johnson | Chris's friendly drug dealer. |
| 3 | Stephen | | Elizabeth's husband. |
| | Alan | | The dog at the Rescue Center. |
| 4 | Tony | Curran | Deceased. |
| | Ian | Ventham | Deceased. |
| 5 | Kendrick | | Ron's grandson. |
| | Joe | | The psychopath. |
| 6 | Douglas | Middlemiss | Elizabeth's ex-husband. |
| | Martin | Lomax | The middleman. Mafia leader. |
| 7 | Terry | Hallet | Chris's detective inspector. |
| 8 | Ryan | Baird | Ibrahim's attacker. |
| 10 | Joanna | | Joyce's daughter. |
| 16 | Jason | | Ibrahim's son. |
| | Eric | Mason | Ibrahim's former client. |
| 17 | Sue | Reardon | Lance's boss. MI5 officer. |
| | Lance | James | Sue's partner. |
| 18 | Andrew | Hastings | Martin's close-protection officers. |
| 20 | Bogdan | Jankowski | Elizabeth's friend. |
| 22 | Siobhan | | Poppy's mother. |
| | | | Part 2 |
| 32 | Maureen | Gilks | Joyce's acquaintance. |
| | Daniel | | Actor. Maureen's nephew. |
| 33 | Carter | | Doctor. |
| 35 | Frank | Andrade Jr. | 2nd-in-command of one of New York's crime families. AKA: Andre Richardson. |
| | Claudia | Andrade | Frank's wife. |
| 38 | Carol | Kirkwood | A weather
forecaster. |
| 40 | Massimo | | An investment banker. |
| 42 | Suzi | | Ron's daughter. |
| | Mark | | The cabbie. |
| | Kendrick | | Ron's grandson. |
| 45 | Julian | Lambert | The man who reviewed Stephen's book. |
| 47 | Keith | | Kendrick's paternal grandfather. |
| | Danny | | Suzi's husband. |
| 49 | Carl | | Donna's ex. |
| 52 | Ruth | | Lance's lover. |
| 55 | Penny | | Former cop. Elizabeth's best friend. |
| 61 | Colin | Clemence | A villager at Cooper's chase. |
| 62 | Steven | | Ryan's cousin. |
| | | | Part 3 |
| 64 | Franco | | A diamond dealer. |
| 70 | Leanne | | Ryan's sister. |
| 71 | Vin | Vincent | A major player. |
| 84 | Sylvia | Finch | The accountant. |
| | Dennis | Finch | Sylvia's husband. |
