1 | Cass | Raines | Former Chicago cop, PI, aka Bean |
| Det. Ben | Mickerson | Cass' partner in the Chicago PD |
| Jimmy | Pick | Murder suspect Cass & Ben are after |
| | Smitty | Fellow Chicago police officer |
| | Solis, Lyles, Grimes | Fellow officers |
| | Farraday | Police officer lacking in skill & temperament |
3 | Dr. Nelson | Voigt | Police psychologist |
| Marcus | | Cass' former boyfriend |
| Adam | Lychee | Bullied child at Cass' grade school |
4 | Mrs. | Vincent | 1st floor tenant in Cass' building |
| Stuart & Marie | Kallish | 2nd floor tenants in Cass' building |
| Nate | Kallish | Stuart & Marie's 4-year-old son |
| Father Ray | Heaton | Activist priest at St. Brendan's Church who asks for Cass' help, aka Pop |
5 | Thea | Bey | Father Ray's housekeeper |
| Father | Pascoe | Father Ray's assistant |
6 | Paul | Helms | Ben Mickerson's new partner |
7 | Anton | Bolek | Parish school janitor |
| George | Cummings | New parishioner at St. Brendan's who had disagreements with Father Ray |
| Janice | Cummings | George's wife |
| Maisie | Rose | Former store owner who sold alcohol & drug paraphernalia to kids, driven out of business by Father Ray, stole his Bible |
8 | Skeeter | Cummings | George & Janice's daughter |
| Lillian | Gibson | Next-door neighbor of the Cummings |
9 | Bo | Kliest | Police officer who once worked with Ben |
| Vince | Turner | Bo's partner |
10 | Reynauld | Rose | Maisie's son, incarcerated |
| Nancy | Akers | Receptionist at St. Brendan's school |
11 | Cesar | Luna | Low-level gangbanger (Scorpion) found dead in St. Brendan's along with Father Ray |
| Charles | Mayo, Jr. | Creole's cook, crook, child-hood friend of Cass', aka Whip |
| | Gleason | Police officer at Ben's station who likes herbal tea |
12 | | Hallstrom | Police officer at Ben's station |
| Hector | Perez | Member in Scorpion gang who last saw Cesar before his death |
| Eli | Weber | Farraday's new partner |
| Lt. | Evans | Ben & Cass's former boss |
| Buster | | Ben's English bulldog |
13 | Irma | Luna | Cesar's mother |
14 | Raffi | | Hector's nephew |
| Marisol | | Hector's sister |
15 | Josephina | | Marisol's friend |
16 | Muna Lee | Steele | Waitress at Deek's Diner |
17 | John | Bergen | Cass' 1st boss on the police force |
| Theodore | Raines | Cass' father, absent for 20 years, now residing in St. Louis |
18 | Sister Barbara | Covey | Childhood friend of Cass & Whip who became a nun, aka Barb |
| Sean | Covey | Barb's brother, aka Booster |
20 | Cleopatra | | Homeless woman |
| Old Sarge | | Homeless man who attacked Cass at the rectory then ran away |
| Bear | Burgett | Runs the Sanctuary food kitchen near St. Brendan's |
21 | Sela | Raines | Theodore's 3rd & current wife |
| Whitford | Raines | Theodore & Sela's son |
22 | Ignacio | | One of Hector Perez's gang members |
| Rashid | | Homeless man works at Angel Arms shelter for the homeless |
| Chester | | Homeless man works at Angel Arms shelter for the homeless |
23 | | Billings | Patrol officer guarding the police barricade at the beach park |
| | Tomlinson | Officer at the scene at the beach park, Billings' superior |
24 | Yancy | Gantt | GI, Old Sarge |
| Ernie | | Dead homeless man who had traded his knife for GI's squat |
25 | | Fisher | Lieutenant at the police station |
26 | Pouch | | Friend of Whip & Barb, ex-con, pickpocket |
27 | Father | Vasquez | Priest at St. Teresa's school |
| Deanna | Baxter | Cesar's girlfriend, aka DeeDee |
| Rev. Ellis | Crowell | Minister at Gentle Peace Outreach Center |
| Trina | | Teenager volunteering at Gentle Peace Outreach, knew Deanna |
30 | Mrs. | Strickley | Elderly wheelchair-bound woman knocked over by man who ran by her |
| Fleece | | Dreadlocked black man wearing a fleece jacket who killed Yancy Gantt in the hospital, aka Amon Jarvis |
| Flabby Guard & Tiny Guard | | Hospital security
officers who chased & caught Cass in the hospital stairwell |