| 1 | Mary Pat | | Protagonist. Jules's mother. AKA: Mary Patricia Fennessy. |
| | Jules | Fennessy | Mary Pat's daughter. Missing. |
| | Brian | Shea | Mary Pat's friend. One of the Butler's Crew. |
| | Marty | Butler | Brian's boss. A criminal gang leader. |
| | Donna | Shea | Brian's wife. |
| | Kenny | Fennessy | Mary Pat's
husband. |
| | Noel | Fennessy | Mary Pat's deceased son. |
| | Ronald | Collins | Jules's boyfriend. AKA: Rum. |
| 2 | Brenda | Morello | Jules's sidekick. |
| | Michael | Shaugnessy | A bar owner. |
| | Tina | McGuiggan | Mary Pat's childhood friend. |
| | Ricky | McGuiggan | Tina's husband. |
| | Timmy | Gavigan | One of Mary Pat's neighbors. |
| | Frankie | Toomie | The killer of Butler's Crew. Jules's lover. |
| | Dukie | | Mary Pat's first husband. |
| 3 | Eugene | Morello | Brenda's father. |
| | Fran | | A nun. |
| | Gert | Armstrong | Mary Pat's co-worker. |
| | Anne | O'Leary | Mary Pat's co-worker. |
| | Calliope | Williamson | Mary Pat's co-worker. Auggie's mother. AKA: Dreamy. |
| | Dottie | Loyd | Mary Pat's co-worker. |
| | Sister | Vi | One of the nuns. |
| | Auggie | Williamson | Dreamy's son. Murdered. |
| 4 | Suze | | Brenda's mother. |
| | Big Peg | McAuliffe | Mary Pat's sister. |
| | Terry | McAuliffe | Big Peg's husband. AKA: Terror Town. |
| | Terry Jr. | McAuliffe | One of Big Peg and Terry's children. |
| | Little Peg | McAuliffe | One of Big Peg and Terry's children. |
| | Freddy | McAuliffe | One of Big Peg and Terry's children. |
| | JJ | McAuliffe | One of Big Peg and Terry's children. |
| | Ellen | McAuliffe | One of Big Peg and Terry's children. |
| | Paudric | McAuliffe | One of Big Peg and Terry's children. |
| | Lefty | McAuliffe | One of Big Peg and Terry's children. |
| | Lorraine | | George's mother. Marty's children. |
| | George | Dunbar | A drug dealer. Rum's friend. |
| | Weeze | | Big Peg and Mary Pat's mother. AKA: Louise. |
| 5 | Bess | | Mary Pat's station wagon. |
| | Tommy | Gallagher | The bartender. |
| 6 | Richard | Nixon | The US President. |
| 7 | Mike | Atardo | Donna's ex. |
| 8 | Vince | Pritchard | Bobby's partner. |
| | Michael | Coyne | The lead detective. AKA: Bobby. |
| 9 | Sister | Loretta | Mary Pat's ex-teacher. |
| | Larry | Foyle | One of Butler's men. |
| | Weeds | | One of Butler's men. |
| 10 | Ella | Williamson | Dreamy's daughter. |
| | Soria | Williamson | Dreamy's daughter. |
| | Reginald | Williamson | Dreamy's husband. |
| 11 | Seamus | Riordan | Tower Crane Operator. A witness. |
| | Cai | | Bobby's taxi girl. |
| 12 | Tim | Coyne | Bobby's brother. |
| | Nancy | Coyne | Bobby's sister. |
| | Bridget | Coyne | Bobby's sister. |
| | Claire | Coyne | Bobby's sister. |
| | Diane | Coyne | Bobby's sister. |
| | Brendan | Coyne | Bobby's son. |
| | Shannon | | Bobby's ex-wife. |
| 13 | Tovah | Shapiro | Marty's attorney. |
| | Mel | | A retired cop. Bobby's sponsor. |
| | Doug R. | | The guy running the support group. |
| | Carl | Johansen | Bobby's friend. Deceased. |
| | Carmen | Davenport | Bobby's girlfriend. |
| 14 | Noreen | Ryan | One of the original SWAB Sisters. |
| | Joyce | O'Halloran | One of the original SWAB Sisters. |
| | Patty | Byrnes | One of the original SWAB Sisters. |
| | Maureen | Kilkenny | One of the original SWAB Sisters. |
| | Hannah | Spotchnicki | One of the original SWAB Sisters. |
| | Carol | Fitzpatrick | The SWAB Sisters' leader. |
| | Shirley | Brackin | One of the speakers. |
| | Geraldine | Guffy | One of the speakers. |
| | Mike | Dowd | One of the speakers. |
| | Edward | Kennedy | Pres. Kennedy's brother. AKA: Teddy. |
| | Bernie | Dunn | One of the organizers. |
| | Cecilia | O'Halloran | Joyce's daughter. |
| 15 | Willy | Pike | Mary Pat's childhood enemy. |
| | John Patrick | | Mary Pat's brother. |
| | Michael Sean | | Mary Pat's brother. |
| | Donnie | | Mary Pat's brother. |
| | Stevie | | Mary Pat's brother. |
| | Bill | | Mary Pat's brother. |
| 17 | Erin | Coyne | Bobby's sister. |
| 18 | Stoner | Pal | Rum's friend. |
| 19 | Pete | Torchio | The duty sergeant. |
| | Giles | Stansfield | Special Agent. |
| 20 | Joe-Dog | Fitz | George's main dealer. |
| | Quentin | Corkery | George's main dealer. |
| 23 | Gregor | | One of the crime tech guys. |
| | Drew | Curran | The medical examiner. |
| 27 | Anthony | Chapstone | Dukie's attorney. AKA: Tony. |
| | Maggie | Wheelock | Tony's secretary. |
| 28 | Caitlin | Toomey | Frank's daughter. |
| | Rory | Prescott | Frank's next-door neighbor. |
