| Christopher | Anderson | Michael Anderson's grandfather. |
| Michael | Anderson | Head of Vocal Studies. |
| Charles | Barclay | Andrew's grandfather. |
| Lois | Best | Zoe, Kim, and Liu's flatmate. |
| Victor | Bisset | French police. |
| Martin | Blackmore | Independent financial forensics analyst. |
| Jean | Boivin | Business tycoon. |
| Lucille | Boivin | Jean Boivin's daughter. |
| Henri | Caron | Jean Boivin's business associate. |
| Hannah | Docherty | Zoe's former tutor. |
| Juliette | Dupuis | Jean Boivin's wife. |
| Alice | Ellis | Michael Anderson's ex-wife. Aka: Alice Anderson. |
| Andrew | Flowers | Zoe's boyfriend. |
| Richard | Flowers | Andrew's father. |
| Harry | Fowles | Andrew and Jai's flat mate. |
| Alice | Hardy | Police Constable. |
| Gregory | James | Detective Inspector, Manchester Police. |
| Marcus | Lee | Former journalist. |
| Sam | Limmond | Alex's ex-boyfriend. |
| | Lipson | Flowers' family lawyer. |
| Jai | Mahmood | Zoe's friend. |
| Sarah | Manning | Former detective constable. |
| John | Marber | Fire and Rescue Service Watch manager. |
| Chloe | Matthews | The actor who played Zoe. |
| Gary | Matthews | Eldest of the Matthews brothers. |
| Anne | Moreau | Jacques' wife. |
| Jacques | Moreau | Prison guard. |
| Marie | Moreau | Jacques' mother. |
| Janine | Morris | Ex-student experience officer. |
| Emmy | Moss | Zoe's Angels alumna. |
| Fintan | Murphy | Zoe's course mate and friend. |
| Kimberly | Nolan | Zoe's twin sister. Aka: Kim. |
| Robert | Nolan | Zoe's father. Aka: Rob. |
| Sally | Nolan | Zoe's mother. |
| Zoe | Nolan | The girl who went missing in 2011. |
| Carys | Parry | Crimewatch former show producer. |
| Ricky | Payne | Property developer. |
| Elise | Pelletier | Foster care runaway. |
| | Roberts | One of the constables. |
| Dot | Sheldon | Cleaning lady. |
| Liu | Wai | Zoe's flat mate and friend. |
| Alex | Wilson | Zoe's flat mate. Aka: Al. |
| Mrs. | Withers | Nanny in Surrey. |
| Chihiro | | Kim's bonsai tree. |
| Connor | | Fintan's flat mate. |
| Élodie | | Andrew's ex-girlfriend. |
| Gaz/Trev | | The boy from the indie disco warehouse. |
| Keith | | Andrew's boss. |
| Kevin | | One of Gary's brothers. Aka: Kev. |
| Louisa | | Alice and Michael's daughter. |
| Mike | | One of Gary's brothers. |
| Patrick | | Fintan's father. |
| Tariq | | Jai's friend. |
| Vladimir | | Drug pusher. Aka: Vlad, Vlad the Inhaler. |
