| 1 | Nye | | The mystery boy. |
| 3 | Janet | Gold | Hospital receptionist at Royal Surrey Hospital. Ed's mother. |
| | Robin | | Janet's colleague. |
| 4 | Jessica | Flynn | The psychologist. Aka: Doctor Flynn. |
| | Jamie | Flynn | Jessie's brother. |
| | Ahmose | | Jessie's boyfriend. |
| 5 | Bobby | Simmons | The detective inspector. Aka: Marilyn. |
| | Danny | Simmons | Marilyn's son. Deceased. |
| | Marilyn | Manson | The American rocker. |
| | Sarah | Workman | The detective sergeant. Aka: DS Workman. |
| | Harry | Lawson | The baby Janet found. Malcolm's son. |
| | Malcolm | Lawson | Harry's father. |
| | Daniel | Lawson | Malcolm's son who commits suicide. Deceased. |
| | Doctor | Butter | Marilyn's acquaintance. |
| 6 | Gideon | Duursema | The head of the defense psychology service. Jessie's boss. |
| | Ryan Thomas | Jones | Jessie's patient. Colonel Wallace's trainee. |
| | Philip | Wallace | The Blackdown's commanding officer. Aka: Colonel Wallace. |
| 7 | Edward | Gold | Police lieutenant at Royal Military Police Investigation. |
| | Ben | Callan | Gold's captain. |
| 9 | Glyn | Morgan | Callan's lead SOCO. |
| | | | SOCO - Scene of the Crime Operatives. |
| | Richard | H. Hough | The commanding officer at Southern Region. |
| | Stephen | Foster | Victim. Deceased. |
| | Martha | Wonsag | Stephen's partner. |
| 10 | Joan | Lawson | Harry's grandmother. Malcolm's mother. |
| 11 | Michael | O'Shaughnessy | The padre at Blackdown. |
| 12 | Sami | Scott | The baby who lost his mother. |
| 16 | Jenny | | The service secretary. |
| 17 | Jace | Harris | The Duty Staff Officer during the incident that happened. |
| 19 | Alice | | Ahmose's ex-wife. Deceased. |
| 24 | Anne | Lawson | Malcolm's wife. |
| 25 | Val | Monks | An Army Pathologist. |
| 27 | Kiddie | Chapler | A police sergeant. |
| 29 | Tony | Burrows | Marilyn's lead CSI. |
| 34 | Pandy | | Jamie's teddy bear. |
| | Diane | | Jessie's step-mother. |
| | Pamela | Brown | The head psychiatric nurse. |
| 40 | Johnny | Marshall | Marilyn's
acquaintance. |
| 45 | Leo | | The guy Leo punched. |
| 46 | Perkins | | One of Callan's officers. |
| 48 | Darren | Cara | A detective constable. |
| 56 | Derek | Porter | One of Malcolm's customers. |
| | Barbara | Porter | Derek's wife. |
| | Felix | Peterson | One of the Malcom's customers. |
| 57 | Wendy | Chubb | Marilyn's former case. |
