| Sharon | Ahearn | The principal at Evie's school. |
| Detective | Ange | D.D's colleague. |
| Dan | Cain | A retired Jacksonville detective. William's colleague. |
| Conrad | Carter | Evie's husband. Deceased. |
| Jennifer | Carter | Conrad's mother. |
| William | Carter | Conrad's father. A Jacksonville detective. |
| Sandi | Clipfell | Missing girl. |
| Carter | Conner | Conrad Carter's alias. |
| Darwin | Dane | Flora's brother. |
| Flora | Dane | A one-time kidnapping victim. The current survivor's advocate. |
| Rosa | Dane | Flora's mother. |
| Dick | Delaney | A top Boston criminal defense attorney. Evie's lawyer. |
| Patricia | Di Lucca | Arson Investigator. Aka: Patti. |
| Keith | Edgar | Flora's new friend. |
| Danielle | Fitzpatrick | The Suffolk county ADA. |
| Evelyn | H. Carter | A girl that accidentaly shot her father. |
| Martin | Hoffman | The retired department chair at Harvard. |
| Earl | Hopkins | Evie's father. |
| Joyce | Hopkins | Evie's mother. |
| Katarina | Ivanova | A girl who substituted Earl's position when he died. |
| Edmund | Kemper III | A man who was raised by his abusive alcoholic mother. |
| Samuel | Keynes | The FBI victim specialist. |
| Rocket | Langley | A possible suspect. |
| Jules | LaPage | A man who made a threats to William when he was arrested. |
| Monica | LaPage | Jules's ex-wife. |
| Betsy | LeBlanc | Phil's wife. |
| Phil | LeBlanc | D.D's former squadmate and one-time mentor. |
| Carol | Manley | D.D's colleague. A petite detective. |
| Tina | Maracle | Missing girl. |
| Cathy | Maxwell | Evie's friend. |
| Jacob | Ness | A man who kidnapped Flora and raped her. |
| Aarav | Patil | Earl's T.A. |
| Mitchell | Paulson | A registered sex offender. |
| Kimberly | Quincy | The SSA. Helped Flora to be rescued. |
| Gary | Speirs | D.D's partner. |
| I.N | Verness | Jacob Ness's username at the Dark Web. |
| Alex | Warren | D.D.'s husband. |
| D.D. | Warren | A sergeant detective at Boston homicide. |
| Jack | Warren | D.D.'s son. |
| Bob | | A police officer. |
| Kiko | | D.D's dog. |
| Neil | | D.D's teammate. |
| Tony | | The greeter. |
