| James | Agar | The man who killed a policeman. |
| Erik | Anderssen | Ruth's first tutor. |
| Madga | Anderssen | Erik's wife. |
| Bob | Bullmore | Ruth's colleague. |
| DS | Clough | The detective sergeant. |
| Alice | Downey | Lucy's mother. |
| Lucy | Downey | The girl who went missing 10 years ago. |
| Tom | Downey | Lucy's father. |
| Derek | Fielding | Harry's first boss. |
| Ruth | Galloway | Protagonist. An archaeology teacher and forensics expert. |
| Simon | Galloway | Ruth's brother. |
| Alan | Henderson | Scarlet's father. |
| Delilah | Henderson | Scarlet's mother. |
| Euan | Henderson | Scarlet's sister. |
| Ocean | Henderson | Scarlet's sister. |
| Scarlet | Henderson | Another missing girl. |
| Tobias | Henderson | Scarlet's brother. |
| Judy | Johnson | A detective constable. |
| John | Martin | A painter. |
| Stephen | Naylor | The policeman that James killed. |
| Harry | Nelson | The detective chief inspector. |
| Laura | Nelson | Harry's daughter. |
| Michelle | Nelson | Harry's wife. |
| Rebecca | Nelson | Harry's daughter. |
| Harry | Nilsson | The physics professor. |
| Mr. | Tan | Ruth's student. |
| Anne | | Liam's girlfriend. |
| Cathbad | | The leader of the group of druids. A lab technician. Aka: Michael Malone. |
| Cathy | | Simon's wife. Ruth's sister-in-law. |
| Daniel | | Peter and Victoria's baby. |
| David | | Ruth's neighbor. |
| Derek | | Ed's friend. |
| Ed | | Sammy's partner. |
| Flint | | Ruth's cat. |
| Juan | | Michelle's boss. |
| Lars | | Magda's lover. |
| Liam | | Shona's boyfriend. |
| Madeleine | | Michael and Delilah's child. |
| Nicole | | Roger's wife. Ed's friend. |
| Peter | | Ruth's ex-lover. |
| Phil | | Ruth's department head. |
| Roger | | Nicole's husband. |
| Sammy | | One of Ruth's neighbors. |
| Shona | | Ruth's friend. |
| Sparky | | Ruth's cat. |
| Sue | | Derek's wife. |
| Tony | | Michelle's boss. |
| Victoria | | Peter's wife. |
| Whitcliffe | | A superintendent policeman. |
