| Ellis |
Anders | Actor, Mim's ex-boyfriend |
| Aaliyah |
Anderson | Missing journalist |
| Ian |
Brady | Child killer |
| William |
Brown | Missing |
| Tanya |
Brown | Missing |
| Mr. |
Dennison | Killer's teacher |
| Emily |
Dicks | Psychologist |
| Abigail |
Douglas | Victim. Aka: Abi |
| Geraldine |
Douglas | Abi's mother |
| Sydney |
Douglas | Abi's father |
| Steven |
Douglas | Abi's brother |
| Michael |
Douglas | Abi's brother |
| Tracy |
Fenton | Former psychiatric patient |
| Bob |
Gadsby | Kylie's co-anchor |
| Gabby |
Gibson | Landlady of the White Hart pub |
| Mark |
Goodwin | Detective investigating the body in the attic |
| Martin |
Hamilton | George's friend |
| Myra |
Hindley | Child killer |
| Frankie |
Holmes | Victim |
| Lorna |
Holmes | Frankie's sister, Mia's former classmate |
| Pat |
Holmes | Lorna's mother |
| Frankie |
Holmes Sr. | Lorna's father |
| Mia |
Hunter | Finn's wife |
| Finn |
Hunter | Mia's husband |
| Dave |
Hunter | Finn's father. Aka: David |
| Debbie |
Hunter | Finn's mother |
| Dwayne |
Johnson | Lead star in the movie Jumanji |
| Jasmine |
Johnson | Woman Mia met at the funeral |
| Precious |
Johnson | Jasmine's daughter |
| Emma |
Jones | One of Finn's ex-girlfriends |
| Chloe |
Jones | Emma and Finn's daughter |
| Kenneth |
Kilgour | Body found in the garden |
| Moira |
Kilgour | Body found in the garden |
| George |
Lewis | Killer's brother |
| Samuel |
Lewis | Debbie and George's father |
| Alice |
Lewis | Debbie and George's mother |
| Caroline |
Mitchell | Ex-police detective |
| Jill |
Morris | Supermarket franchisee |
| Adebayo |
Okafor | Lead detective at the press conference |
| Kylie |
Pentelow | News anchor |
| Justin |
Powell | Killer's first murder victim |
| Nicky |
Roberts | Victim |
| Sonny |
Smith | Mia and Finn's son |
| Karl |
Stuart | Detective in charge of Anderson's case |
| Kate |
Thurston | T.V personality |
| Carole |
Watson | Chief crime reporter |
| Fred |
West | Child killer |
| Rosemary |
West | Child killer |
| Claie |
Wilson | Reporter |
| Connor |
| Boy Debbie was supposed to kidnap |
| Helena |
| Mia's boss |
| Jakub |
| Dave's co-worker, pill supplier |
| Liz |
| Mia's therapist |
| Sue |
| Connor's mother |