| Enid |
Blyton | Novelist. |
| Garda |
Breen | McConville's partner. |
| Kyle |
Byrde | Carrie's ex-boyfriend. |
| Colin |
Dobson | Marissa's business partner. |
| Demot |
Downey | Peter's client. |
| Dr. |
Downey | Marissa's doctor. |
| Joe |
Downey | Jenny's neighbor. |
| Sinead |
Downey | Joe's daughter. |
| Alex |
Fenelon | Marissa's old friend. |
| Mr. |
Fenelon Sr | Alex's father. |
| Caroline |
Finch | Jenny's minder. |
| Faye |
Foster | Journalist that Irene contacted. |
| Adeline |
Furlong-Kennedy | Richie's mother. |
| Ana |
Garcia | Marissa's minder. |
| Brian |
Irvine | Peter's brother. |
| Lia |
Irvine | Peter's sister. |
| Marissa |
Irvine | Protagonist. |
| Milo |
Irvine | Marissa's son, missing. |
| Peter |
Irvine | Marissa's husband. |
| Jenny |
Kennedy | The mom at Milo's school. |
| Richie |
Kennedy | Jenny's husband. |
| Grace |
Loftus | One of Marissa's friends. |
| Robert |
Melville | Journalist. |
| Robert |
Murphy | Carrie's father, a career criminal. |
| Sorcha |
Ni Riada | Journalist. |
| Sarah |
Rayburn | One of the mothers at Milo's school. |
| Fiona |
Sheridan | Sergeant, Milo's interviewer. |
| Irene |
Turner | Carrie's mother. |
| Danny |
Vaughan | Murdered. |
| Victor |
Waddock | One of the fathers in school. |
| Robin |
Watkins | The name on the passport. |
| Sienna |
Watkins | Rob's new girlfriend. |
| Jacob |
Wilcox | Jenny's son. |
| Mr. |
Williams | Milo's teacher. |
| Annie |
| Kyle's cousin. |
| Caleb |
| One of Carrie's brothers. |
| Carrie |
| Jacob's nanny. |
| Claudia |
| Victor's childminder. |
| Cole |
| One of Carrie's brothers. |
| Elaine |
| One of Jenny's workmates. |
| Esther |
| The owner of the house that wasn't Jenny's. |
| Frank |
| Irene's partner. |
| Kathy |
| Carrie's sister. |
| Lena |
| The name Carrie used when talking to Colin. |
| Mark |
| Jenny's workmate. |
| May |
| Brian's girlfriend. |
| McConville |
| Detective sergeant. |
| Michael |
| Runs a missing persons campaign. |
| Pierre |
| Jenny's boss. |
| Rose |
| Richie's family maid. |
| Sarah |
| One of the mothers in school. |
| Scott |
| One of Carrie's brothers. |
| Shauna |
| One of Marissa's employees. |
| Tara |
| Psychologist. |
| Verena |
| Tea garden manager. |
