| 1 | Jen | Rafferty | A detective sergeant. |
| | Cynthia | Prior | A magistrate. |
| | Wesley | Curnow | Cynthia's friend. aka: Wes. |
| | Nigel | Yeo | A medic. |
| 2 | Ella | | Jen's daughter. |
| | Ben | | Jen's son. |
| | Zach | | Ella's boy friend. |
| | Matthew | Venn | A detective inspector. |
| | Ross | May | A detective constable. |
| | Robbie | | Jen's ex-husband. |
| | Jonathan | Church | Matthew's husband. |
| | Eve | Yeo | Nigel's daughter. aka: Evie. |
| | Sally | Pengelly | A pathologist. |
| | Francis | Ley | An economist. aka: Frank. |
| | John | Grieves | A tenant of Francis Ley. |
| | Sarah | | John Grieves' wife. |
| | Alexander | Mackenzie | Ley's friend. aka: Mack. |
| | George | | Mack's father. |
| | Martha | | Mack's mother. |
| 4 | Daisy | | One of Sarah and John's daughters. |
| | Lily | | One of Sarah and John's daughters. |
| 5 | Brian | Branscombe | The crime scene manager. |
| | Janey | Mackenzie | Mack's sister. |
| 6 | Dorothy | Venn | Matthew's mother. |
| | Helen | Yeo | Eve's mother. |
| | Lucy | Braddict | A part-time waitress. |
| 7 | Nancy | | Ley's mother. |
| 8 | Lindsay | | Owner of the Glorious Oyster resto. |
| | Joe | Oldham | Matthew's boss. |
| | Lauren | Miller | Matthew's colleague. |
| 10 | Finn | | One of Dr. Sally's children. |
| | Jo | | One of Dr. Sally's children. |
| | Freddie | | One of Dr. Sally's children. |
| 11 | Mel | | Ross May's wife. |
| 12 | Roger | Prior | Cynthia's husband. |
| 14 | Vicki | Robb | A police constable. |
| | Luke | Wallace | A boy who committed suicide in London. |
| 15 | Sharon | | A police officer. |
| 16 | Anthony | | Dorothy's acquaintance. |
| 20 | Martin | | A financial journalist. Wesley's father. |
| | Liz | | Wesley's mother. |
| 21 | Simon | Walden | The victim in Matthew's first North Demon murder inquiry. |
| | Fiona | Radley | Head of the comms. |
| | Ratna | Joshi | A psychiatrist. |
| 23 | Steph | Bull | An admin. officer. |
| | Julie | | One of the employees at NDPT. |
| | Tony | | One of the employees at NDPT. |
| | Philip | | The previous boss at the NDPT. |
| | Millie | | Former finance officer at NDPT. |
| 24 | Bob | | The cafe manager. |
| | Maurice | Braddick | Lucy's father. |
| | Paul | Reed | A writer. |
| 27 | Lizzie | | Ratna's acquaintance. |
| 28 | Viv | Reed | Paul's mother. |
| 30 | Joanne | | Mel's friend. |
| | Steven | Barton | A digital forensic expert. aka: Steve. |
| 39 | Peter | Mason | Francis Ley's lawyer. |
| 45 | Chrissie | | A missing woman with Down syndrome disease. |
