| Z | Zoe | Maisey | Gifted concert pianist, Tessa's niece |
| | Lucas | Kennedy | Gifted concert pianist - step brother to Zoe |
| | Marie Maisey | Kennedy | Mom of Zoe, Stepmom of Lucas, Tess's sister |
| | Tessa | | Zoe's Aunt, Maria's sister, Vet |
| S | Sam | Locke | Criminal lawyer, having an affair with Tessa |
| | Zoe | Guerin | aka Zoe Maisey |
| | Jeanette | | Sam's secretary |
| T | Richard | | Tessa's husband |
| | Philip | Guerin | Marie's first husband |
| Z | Mr. Tom | Barlow | Zoe killed his daughter |
| | Amelia | Barlow | Tom's daughter (aka Amy) |
| | | | Police Sergeant |
| | | | Social Worker |
| T | Chris | Kennedy | Marie's second husband |
| Z | Katya | | au pair |
| | Grace | Kennedy | Lucas & Zoe's baby sister |
| | Barney | Scott | Katya's boyfriend |
| | Jack | Bell | Popular guy at school (also died in the accident) |
| | Eva | Bell | Popular girl at school |
| L | Julia | Kennedy | Chris's first wife, Lucas's mom |
| S | Ruth | | Solicitor |
| | Gull | | Zoe's best friend |
| | Jason | | Key worker |
| | Granny | Guerin | Zoe's Grandma |
| | Douglas | | Eva's boyfriend |
| | Conner | | Friend in the Unit (breaking & entering - repeatedly) |
| | Ellie | | Friend in the Unit (common assault, three strikes & you're out |
| | | | Family liason officer |
| | | | Detective 1 |
| | | | Detective 2 |
| | | | Officer with DNA test |
| | Tamara | Jones | Au pair representative |
| | | | Consultant who reads Sam's scan |
| | | | Doctor |
| | | | MS specialist |
