| | | | Part I |
| 2 | Grace | McColl | A crime scene investigator. |
| | Daniel | Robertshaw | A young policeman. Aka: Danny. |
| | Jim | Airey | A volunteer special constable. |
| | Lewis | Hamilton | A British racing driver. |
| | Ben | | A German shepherd. |
| 3 | Nick | Weston | A detective constable. |
| | Wyatt | Earp | An old West lawman and gambler. |
| 5 | Angela | Inglis | Frederickson's friend. |
| | Giles | Frederickson | A Major. |
| | Edith | | Jim Airey's daughter. |
| 8 | Partick | Bardwell | Hogg's acquaintance. |
| 9 | Tallie | | Grace's dog. |
| | Lisa | | Nick's girlfriend. |
| | Sofie | | Nick and Lisa's daughter. |
| 10 | Richard | Sibson | Head of the CSI. Grace McColl's boss. |
| | | | Part II |
| 13 | Max | Carris | Grace's ex-husband. |
| 14 | Matthew | Mercer | A detective superintendent. |
| | Brian | Pollock | A detective inspector. |
| | Duncan | Inglis | Angela Inglis' ex-husband. |
| 15 | Ian | Hogg | Edith's employer. |
| | Michael Robert | Ryan | A 27-year old who shot and killed 16 people including his mother. |
| 19 | Jack | Russell | A terrier. |
| 22 | Professor | Evans | A professor at the University at Lancaster |
| 28 | Karl | | Lisa's brother. |
| | | | Part IV |
| 43 | Pete | Tawney | A military prisoner. |
| 46 | Steve | Scott | One of Sibson's colleagues. |
| | Paul | McKendrick | One of Sibson's colleagues. |
| | Ken | Alcott | One of Sibson's colleagues. |
| | Tyson | Frost | One of Sibson's colleagues. Aka: Ty. |
| | Christopher | Blenkenship | One of Sibson's colleagues. Aka: Chris. |
| | Tony | Marsh | One of Sibson's colleagues. |
| | | | Part V |
| 54 | Young | Yardley | A detective constable. |
| 55 | Lyudmila | Pavlichenko | A Soviet sniper. |
| | | | Part VI |
| 71 | Brad | Pitt | An American actor. |
| 73 | Gary | Quinn | A former SAS. |
| 85 | Conor | O'Keefe | A sniper. |
| | | | Part VII |
| 101 | Mrs. | Airey | Jim's wife. |
| | | | Part VIII |
| 110 | Foo | Fighters | An American rock band. |
| 111 | Dory | Previn | An American lyricist. |
| | Henry | Thoreau | An American naturalist, poet, essayist and philosopher. |
| Epi | Nadine | | Edith's acquaintance. |
