| | | | Part 1 |
| 1 | Steve | Waters | Kate's husband. |
| | Kate S. | Waters | Steve's wife. A news reporter. |
| | Jake | Waters | Kate and Steve's son. Aka: JW. |
| | Freddie | Waters | Kate and Steve's son. Jake's brother. |
| 2 | Lesley | O'Connor | Alex's mother. |
| | Malcolm | O'Connor | Lesley's husband. Alex's father. |
| | Alexandra | O'Connor | Lesley and Malcolm's missing daughter. Aka: Alex. |
| | Rosie | Shaw | Alex's friend in Thailand. |
| | Jenny | Shaw | Rosie's mother. |
| 3 | Zara | Salmond | The detective. |
| | Bob | Sparkes | Zara's boss. The detective inspector. |
| | Eileen | Sparkes | Bob's wife. |
| | Sam | Sparkes | Bob and Eileen's daughter. |
| 4 | Joe | Jackson | A young reporter. Kate's colleague. |
| | Terry | | Jackson's boss. |
| 5 | Don | Richardson | The Post's Southeast Asia correspondent. |
| 6 | Simon | Pearson | News editor. |
| | Danny | O'Connor | Alex's brother. Aka: Dan. |
| | Mick | Murray | The photographer. |
| | Deepika | | Law firm partner. |
| 7 | Mags | Harding | Alex's best friend. |
| | Lars | de Vries | One of Alex and Rosie's boy friends from Thailand. Aka: Diederik, Dr. Rappo. |
| 10 | Mike | Shaw | Rosie's father. |
| | Imogen | Shaw | Mike's new wife. |
| | Glen | Taylor | A suspect in the Bella Elliot kidnapping case. |
| 12 | Constance | Shaw | Mike's mother. |
| | Jamie | Lawrence | The man Alex met at Thailand. Aka: JW, Jamie Way. |
| 13 | Nina | | Terry's assistant. |
| 15 | George | Clarkson | The man who worked at The Telegraph. |
| | Louise | Butler | The man who worked at The Herald. |
| 17 | Clive | Barnes | The Vice Consul. |
| | | | Part 2 |
| 27 | Sheila | | Danny's aunt. |
| | Rick | | Danny's uncle. Sheila's husband. |
| 32 | Hilary | | Sparkes' colleague. |
| 36 | Fran | | Jenny's sister. |
| 39 | Gail | | One of the feature writers. |
| 40 | Dr. Aoife | Mortimer | Forensic pathologist. |
| | Wendy | Turner | Family liaison officer. |
| 41 | Helen | | The palliative nurse. |
| 49 | Albert | | Kate's friend. |
| 51 | Mr. | Watson | Jamie's former employer. |
| 54 | Chloe | Wellington | The detective chief inspector. |
| 55 | Prasongsanti | | The colonel. |
| | Jason | Fellowes | Police officer. |
| | Nicole | Ratner | Videographer. Jason's colleague. |
| 61 | Mama | | Owner of the guest house where Alex and Rosie stayed. |
