| Pamela | Brown | The head psychiatric nurse. |
| Tony | Burrows | Marilyn's lead CSI. |
| Doctor | Butter | Marilyn's acquaintance. |
| Ben | Callan | Gold's captain. |
| Darren | Cara | A detective constable. |
| Kiddie | Chapler | A police sergeant. |
| Wendy | Chubb | Marilyn's former case. |
| Gideon | Duursema | The head of the defense psychology service. Jessie's boss. |
| Jamie | Flynn | Jessie's brother. |
| Jessica | Flynn | The psychologist. Aka: Doctor Flynn. |
| Stephen | Foster | Victim. Deceased. |
| Edward | Gold | Police lieutenant at Royal Military Police Special Investigation. |
| Janet | Gold | Hospital receptionist at Royal Surrey Hospital. Ed's mother. |
| Richard | H. Hough | The commanding officer at Southern Region. |
| Jace | Harris | The Duty Staff Officer during the incident that happened. |
| Ryan Thomas | Jones | Jessie's patient. Colonel Wallace's trainee. |
| Anne | Lawson | Malcolm's wife. |
| Daniel | Lawson | Malcolm's son who commits suicide. Deceased. |
| Harry | Lawson | The baby Janet found. Malcolm's son. |
| Joan | Lawson | Harry's grandmother. Malcolm's mother. |
| Malcolm | Lawson | Harry's father. |
| Marilyn | Manson | The American rocker. |
| Johnny | Marshall | Marilyn's acquaintance. |
| Val | Monks | An Army Pathologist. |
| Glyn | Morgan | Callan's lead SOCO. |
| Michael | O'Shaughnessy | The padre at Blackdown. |
| Felix | Peterson | One of the Malcom's customers. |
| Barbara | Porter | Derek's wife. |
| Derek | Porter | One of Malcolm's customers. |
| Sami | Scott | The baby who lost his mother. |
| Bobby | Simmons | The detective inspector. Aka: Marilyn. |
| Danny | Simmons | Marilyn's son. Deceased. |
| Philip | Wallace | The Blackdown's commanding officer. Aka: Colonel Wallace. |
| Martha | Wonsag | Stephen's partner. |
| Sarah | Workman | The detective sergeant. Aka: DS Workman. |
| Ahmose | | Jessie's boyfriend. |
| Alice | | Ahmose's ex-wife. Deceased. |
| Diane | | Jessie's step-mother. |
| Jenny | | The service secretary. |
| Leo | | The guy Leo punched. |
| Nye | | The mystery boy. |
| Pandy | | Jamie's teddy bear. |
| Perkins | | One of Callan's officers. |
| Robin | | Janet's colleague. |
