| | | | Part One |
| | Alexandra | Cormier | A superior court judge. Josie's mother. |
| | Josephine | Cormier | Alex's daughter. Peter's former close friend. |
| | Matthew | Royston | Josie's boyfriend. Aka: Matt. |
| | Madeleine | Shaw | Courtney's sidekick. One of Peter's victims. Aka: Maddie. |
| | Drew | Girard | Matt's friend. |
| | Trey | McKenzie | Matt's friend. |
| | John | Eberhard | Matt's friend. |
| | Patrick | Ducharme | The sole detective of Sterling Police. |
| | Eddie | Odenkirk | Patrick's workmate. |
| | Tara | Frost | Nina's daughter. Patrick's goddaughter. |
| | Nina | Frost | Tara's mother. Patrick's bestfriend. |
| | Brady | Pryce | A football player. Josie's friend. |
| | Haley | Weaver | Brady's girlfriend. Homecoming queen in Sterling High. |
| | Edward | McCabe | Peter's math teacher. One of Peter's victims. Aka: Ed. |
| | Judge | Wagner | Alex's colleague. |
| | Judge | Gerhardt | Alex's colleague. |
| | Mr. | O'Reilly | The defendant who flirted with Alex. |
| | Lacy | Houghton | Alex's midwife and friend. Peter's mother. |
| | Janine | | Lacy's patient. |
| | Peter | Houghton | Lacy's son. The school shooter who killed 10 students. |
| | Natalie | Zlenko | One of Peter's victims. The President of Glaad Club. |
| | Courtney | Ignatio | Alpha female at Sterling High. One of Peter's victims. |
| | Angela | Phlug | Natalie's friend. The weird girl who was bullied. |
| | Fiona | Kierland | Freshman at Sterling High. |
| | Michael | Beach | Freshman at Sterling High. |
| | Justin | Friedman | Michael's friend. One of Peter's victims. |
| | Dusty | Spears | A basketball coach at Sterling High. |
| | Lewis | Houghton | Lacy's husband. Peter's father. |
| | Zoe | Patterson | Mr. McCabe's student. One of Peter's victims. |
| | Chief | O'Rourke | Patrick's superior. |
| | Loomis | Bronchetti | Alex's former client. |
| | Logan | Rourke | Josie's father. Alex's trial advocacy professor and lover. |
| | Elaine | Chao | The head of the Department of Labor. |
| | Nadya | Saranoff | One of Alex's former clients. |
| | Jarvis | | Patrick's colleague. |
| | Diana | Leven | An assistant attorney general in Boston. |
| | Whitaker | Obermeyer | One of Peter's victims. |
| | Kaitlyn | Harvey | One of Peter's victims. |
| | Emma | Alexis | One of Peter's victims. A beautiful girl in Sterling High. |
| | Min | Horuka | One of Peter's victims. Exchange student from Tokyo. |
| | Gunther | Frankenstein | A state medical examiner. Patrick's friend. |
| | Arthur | McCallister | The school principal at Sterling High. |
| | Topher | McPhee | One of Peter's victims. The school's pot dealer. |
| | Grace | Murtaugh | One of Peter's victims. Daughter of a local minister. |
| | Jordan | McAfee | Peter's lawyer. |
| | Selena | McAfee | Jordan's wife. |
| | Thomas | McAfee | Jordan's son on his first marriage. |
| | Sam | Mcafee | Jordan and Selena's baby. |
| | Joseph | Houghton | Peter's brother. Deceased. Aka: Joey. |
| | Linus | Froom | Alex's client. |
| | Whit | Hobart | Alex's former boss in the public defender's office. |
| | Teddy | | Alex's former client. |
| | Jeanne | Shaheen | A young democratic governor. |
| | Ishmael | | Clerk in Alex's office. |
| | Joan | McCabe | Ed's sister. |
| | Ervin | Peabody | College Psychiatry professor. |
| | Miss | Ritolli | Josie's former teacher. One of Peter's victim's. |
| | Selma | Abernathy | Patrick's favorite technician. |
| | Meredith | Viera | A news anchor. |
| | Ann | Curry | A news reporter. |
| | Raven | Napalm | Lead singer of the band "Death Wish". |
| | Roman | Nelson | The senator in South Dakota. |
| | Mrs. | Edgar | One of the teachers in Sterling High. |
| | Charles | Albert | The judge in Peter's case. |
| | Liz | | The groundskeeper. Alex's friend. |
| | Yvette | Harvey | Kaitlyn's mother. |
| | Mr. | Royston | Matt's father. |
| | Carnivore | | Peter's cellmate. |
| | Hugh | MacQuarie | The chairman of the Econ Department. |
| | Orestes | | Peter's friend. |
| | Austin | Prokiov | One of Peter's victims. |
| | Mrs. | McDonald | Peter's art teacher. |
| | Mrs. | Rasmussin | Peter's former teacher. |
| | Kelly | Gamboni | A victim of gang-rape. Lacy's patient. |
| | Derek | Markowitz | Peter's friend. A computer wizard. |
| | Mr. | Yarbrowski | Peter's soccer coach. |
| | Dolores | Keating | Peter's former classmate. |
| | Mark | Ignatio | Courtney's father. |
| | Philip | O'Shea | Ed's gay partner. |
| | Eleanor | | Alex's clerk. |
| | David | Iannucci | One of the judges in Peter's case. |
| | Dozer | | Lacy's dog. |
| | Marcia | Clark | The vet's assistant. |
| | Mrs. | Aracort | A teacher-adviser to the cheerleaders. |
| | Arliss | Undergroot | A sheetrock installer. |
| | Rodney | Eakes | A bank teller. |
| | Mr. | Cargrew | Peter and Josie's boss. Owner of a xerox shop. |
| | Joe | Urquhardt | A Canadian banker. |
| | Mrs. | Sandringham | Peter's English teacher. |
| | Kurt | | Gay. Someone Peter met at a Gay Bar. |
| | Rico | | A bartender at the Gay Bar. |
| | Mrs. | Wahl | The librarian at Sterling High. |
| | Janet | Isinghoff | Lacy's patient who doesn't want her as midwife. |
| | Elena | Battista | A girl who was doing research about bullying. |
| | Katie | Riccobono | A wife who had plunged a knife to her husband's chest. |
| | King | Wah | A specialist in Battered Woman Syndrome. |
| | Joe | Riccobono | Katie's abusive husband. Deceased. |
| | Dee Dee | Markowitz | Derek's mother. |
| | Mr. | Weatherball | Peter's neighbor. A retired cop. |
| | | | Part Two |
| | Mr. | Alstrop | An architect. Potential juror in Peter's case. |
| | Mrs. | Whyte | The school's gym secretary. |
| | Curtis | Uppergate | A forencsic psychiatrist. |
| | Lawrence | Ghertz | Neuropsychiatrist who examined Peter. Dr. King's colleague. |
