| Pro | Paige | Delaney | FBI Analyst on Sandman's case. |
| | Daniel | Miller | A serial killer that Delaney hunts. AKA: Danny, Sandman, Coney Island Killer. |
| | Carrie | Miller | The Accomplice. Daniel's wife. |
| | Gacy | | One of the well-known serial killers. |
| | BTK | Killer | One of the well-known serial killers. |
| | The Green River | Killer | One of the well-known serial killers. |
| | Bill | Seong | The Task force lead. AKA: William Seong. |
| | Stacy | Nielsen | One of Sandman's victims. |
| 1 | Eddie | Flynn | A law firm owner. Carry's new lawyer. |
| | Denise | | Experienced legal secretary. |
| | Harry | Ford | Eddie's old mentor. |
| | Melissa | Bloch | Eddie's investigator. |
| | Kate | Brooks | Eddie's firm partner and co-counsel. |
| | Otto | Peltier | A well-known criminal lawyer. Carrie's old lawyer. |
| 4 | Chester | Morris | A doorman. |
| | Rudnick | | An agent at CID. |
| 6 | Dollar | Bill | A serial killer. |
| | Tom | | Duty manager. |
| 7 | Margaret | Sharpe | A marketing director. One of Sandman's victims. |
| | Harper | | The woman that Eddie loved and lost. |
| | Petra | | Margaret's gym friend. |
| | Chester | Morris | A witness. |
| | Penny | Jones | Suzanna's roommate. |
| | Suzanna | Abrams | A singer-songwriter. |
| | Teresa | Vasquez | A witness. |
| | Lillian | Parker | A freelance designer. One of the victims. |
| | Tobias | Nielsen | Stacey's husband. |
| | Elly | Nielsen | Stacey's daughter. |
| | Amy | Flynn | Eddie's daughter. |
| | Kevin | | Amy's step-father. |
| | Christine | | Eddie's ex-wife. |
| 8 | Gabriel | Lake | A serial killer hunter. |
| 9 | Joshua | Kane | A killer. |
| 11 | Mike | Stone | A detective. |
| 12 | Halina | | The waitress. |
| 13 | Peter | Durant | Current occupant. |
| | Teresa | Vasquez | Lillian Parker's neighbor. |
| 16 | George | Metesky | The mad bomber. |
| | Dennis | | The building inspector. |
| 17 | Leo | Stoker | A judge. |
| | Betty | Clarke | A crime correspondent. |
| | Ray | | A hotdog stand owner. |
| 19 | Lucy | | The cat. |
| 20 | Miggs | | The older agent. |
| 22 | Julian | | Miggs' partner. |
| 24 | Clarence | | Harry's dog. |
| 30 | Jerry | | Stoker's clerk. |
| | Ethel | Gorman | One of the jurors. |
| | Clay | Dryer | The first alternate juror. |
| 31 | Parks | | One of the agents who had been guarding Teresa Vasquez. |
| | Mrs. | Broder | The woman with the best candy in the neighborhood. |
| 32 | Farley | Climpton | The medical examiner. |
| | Archie | Bunsen | A lawyer for slumlords. |
| | Moonman | | Bunsen's personal bodyguard. |
| 39 | Cal | Johnson | Forensic scientist. |
| 43 | Daisy | Broder | A witness. |
| 44 | Chester | Morris | One of the alleged eyewitnesses. |
| 49 | Jimmy | Fellini | Eddie's childhood friend. AKA: The Hat. |
| 50 | Anthony | Lombardi | Jimmy's cousin. AKA: Tony. |
| 57 | Old | Fellini | A crime syndicate. Jimmy's father. |
| | Wings | | One of Fellini's men. |
