| Jim | Airey | A volunteer special constable. |
| Mrs. | Airey | Jim's wife. |
| Ken | Alcott | One of Sibson's colleagues. |
| Partick | Bardwell | Hogg's acquaintance. |
| Christopher | Blenkenship | One of Sibson's colleagues. Aka: Chris. |
| Max | Carris | Grace's ex-husband. |
| Wyatt | Earp | An old West lawman and gambler. |
| Professor | Evans | A professor at the University at Lancaster |
| Foo | Fighters | An American rock band. |
| Giles | Frederickson | A major. |
| Tyson | Frost | One of Sibson's colleagues. Aka: Ty. |
| Lewis | Hamilton | A British racing driver. |
| Ian | Hogg | Edith's employer. |
| Angela | Inglis | Frederickson's friend. |
| Duncan | Inglis | Angela Inglis' ex-husband. |
| Tony | Marsh | One of Sibson's colleagues. |
| Grace | McColl | A crime scene investigator. |
| Paul | McKendrick | One of Sibson's colleagues. |
| Matthew | Mercer | A detective superintendent. |
| Conor | O'Keefe | A sniper. |
| Lyudmila | Pavlichenko | A Soviet sniper. |
| Brad | Pitt | An American actor. |
| Brian | Pollock | A detective inspector. |
| Dory | Previn | An American lyricist. |
| Gary | Quinn | A former SAS. |
| Daniel | Robertshaw | A young policeman. Aka: Danny. |
| Jack | Russell | A terrier. |
| Michael Robert | Ryan | A 27-year old who shot and killed 16 people including his mother. |
| Steve | Scott | One of Sibson's colleagues. |
| Richard | Sibson | Head of the CSI. Grace McColl's boss. |
| Pete | Tawney | A military prisoner. |
| Henry | Thoreau | An American naturalist, poet, essayist and philosopher. |
| Nick | Weston | A detective constable. |
| Young | Yardley | A detective constable. |
| Ben | | A German shepherd. |
| Edith | | Jim Airey's daughter. |
| Karl | | Lisa's brother. |
| Lisa | | Nick's girlfriend. |
| Nadine | | Edith's acquaintance. |
| Sofie | | Nick and Lisa's daughter. |
| Tallie | | Grace's dog. |
