| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Alexa L. Fogel | Crew | Production | Casting | 13 |
 Bobby Moresco | Crew | Production | Executive Producer, Director, Writer, Creator | 13 |
 Daniel Minahan | Crew | Directing | Director | 1 |
 Denise Pleune | Crew | Production | Associate Producer | 13 |
 James Bigwood | Crew | Production | Producer | 13 |
 Jeff King | Crew | Production | Supervising Producer | 13 |
Kim Clements | Crew | Production | Co-Producer, Writer, Story, Teleplay | 13 |
 Mark Isham | Crew | Sound | Original Music Composer | 13 |
Mark R. Harris | Crew | Production | Co-Executive Producer | 13 |
 Paul Haggis | Crew | Production | Executive Producer, Director, Writer, Story, Creator | 13 |
Rafael Alvarez | Crew | Production | Producer | 13 |
Rick Butler | Crew | Art | Production Design | 13 |
Sean Whitesell | Crew | Production | Co-Executive Producer, Teleplay | 13 |
Dana Maksimovich | Crew | Production | Co-Producer | 13 |
 Allan Steele | Cast | Actor | Detective Calero | 1 |
 Anthony Grasso | Cast | Actor | Building Department Clerk | 1 |
 Audrie Neenan | Cast | Actress | Gertie | 1 |
 Bradley White | Cast | Actor | Ed | 1 |
 Brian Donahue | Cast | Actor | Jackie (uncredited) | 3 |
 Brian Tarantina | Cast | Actor | Vinnie Culiari | 13 |
 Chance Kelly | Cast | Actor | Paddy | 1 |
 Chris Bauer | Cast | Actor | Huey Farrell | 1 |
 Chris Kipiniak | Cast | Actor | Sharkey | 2 |
 Elizabeth Regen | Cast | Actress | Mia | 1 |
 Frank Bonsangue | Cast | Actor | Wiseguy | 1 |
Frank Page | Cast | Actor | Richie | 1 |
 Geoffrey Wigdor | Cast | Actor | Tommy 'Teach' Corcoran | 1 |
 Glenn Taranto | Cast | Actor | Guy at Counter | 1 |
 James Badge Dale | Cast | Actor | Samson | 1 |
Jay Spadaro | Cast | Michael Hogan | 1 | |
 John Bolger | Cast | Actor | Bobby Donnelly (uncredited) | 1 |
 John Cenatiempo | Cast | Actor | Italian Soldier #2 | 1 |
John Juback | Cast | Actor | Leo | 1 |
John-Luke Montias | Cast | Actor | Detective | 1 |
 Jonathan Tucker | Cast | Actor | Tommy Donnelly | 13 |
 Joseph D'Onofrio | Cast | Actor | Louie Downtown | 2 |
 Kate Mulgrew | Cast | Actress | Helen Donnelly | 3 |
 Kathleen Doyle | Cast | Actress | Helen Donnelly | 1 |
 Keith Nobbs | Cast | Actor | Joey 'Ice Cream' | 13 |
 Ken Garito | Cast | Actor | Anthony Lino | 1 |
 Kevin Conway | Cast | Actor | Jenny's Pop | 3 |
 Kirk Acevedo | Cast | Actor | Nicky Cottero | 13 |
 Lee Sellars | Cast | Actor | Man | 1 |
 Lenny Venito | Cast | Actor | Benny Cool | 1 |
 Mark Margolis | Cast | Actor | Sal Minetta | 1 |
 Michael Rispoli | Cast | Actor | Alo (uncredited) | 1 |
 Ned Eisenberg | Cast | Actor | Frankie Stein | 4 |
 Nick Damici | Cast | Actor | Ray | 1 |
 Paul Calderon | Cast | Actor | Detective at Prison | 1 |
 Peter Greene | Cast | Actor | Derek 'Dokey' Farrell | 13 |
 Richard Petrocelli | Cast | Actor | Italian Soldier #1 | 1 |
 Richard Topol | Cast | Actor | Doctor | 1 |
Sean Cory | Cast | Actor | Store Owner (uncredited) | 1 |
 Sean Patrick Reilly | Cast | Actor | Mel Donnelly | 3 |
 Sherri Parker Lee | Cast | Lisa Tyler | 1 | |
 Sonny Marinelli | Cast | Actor | Detective Sunny | 1 |
 Tom Guiry | Cast | Actor | Jimmy Donnelly | 13 |
 Tom Riis Farrell | Cast | Actor | Building Inspector Ferguson | 1 |
 Wass Stevens | Cast | Actor | Dickie | 1 |
 Betsy Beutler | Cast | Actress | Joanie | 3 |
 Billy Lush | Cast | Actor | Kevin Donnelly | 13 |
 Christopher Shand | Cast | Actor | (uncredited) | 1 |
 Daniel Manche | Cast | Actor | Kid | 1 |
 Dylan Hartigan | Cast | Actor | Young Joey | 1 |
Greg D'Agostino | Cast | Italian Soldier #3 (uncredited) | 1 | |
 Harris Doran | Cast | Actor | Book Store Clerk | 1 |
 Jason Furlani | Cast | Actor | George | 1 |
Jimmy Walsh | Cast | Actor | Jimmy Donnelly - Age 11 | 3 |
Kenny Marino | Cast | Actor | McGee | 1 |
 Kevin Cannon | Cast | Actor | Westie | 1 |
 Lauren Bittner | Cast | Actress | Mary Ann Maxwell (uncredited) | 1 |
 Michael Stahl-David | Cast | Actor | Sean Donnelly | 13 |
 Olivia Wilde | Cast | Actress | Jenny Reilly | 13 |
Olja Hrustic | Cast | Flirting Girl | 1 | |
 Patrick Brennan | Cast | Actor | Earl | 13 |
 Seamus Davey-Fitzpatrick | Cast | Actor | (uncredited) | 1 |
 Tom Verri | Cast | Thug | 1 | |
 Elizabeth Gillies | Cast | Actress | Young Jenny | 3 |
 Kate Nowlin | Cast | Actress | Doctor | 1 |
 Laurence Blum | Cast | Actor | Nervous Lowlife | 1 |
 Bonnie Discepolo | Cast | Actress | Nosy Neighbor | 1 |
 Che Landon | Cast | Actress | Rosie Maxwell | 1 |
 Seth Donavan | Cast | Actor | Hockey Player (uncredited) | 1 |
 Maria Di Angelis | Cast | Actress | Interrogation Cop | 1 |
Dominick Mancino | Cast | Mobster (uncredited) | 1 | |
 David C. Roehm Sr. | Cast | Gurney Patient (uncredited) | 1 | |
Max Miner | Cast | Tommy Donnelly - Age 8 | 3 | |
Erika Michels | Cast | Prison Nurse | 1 | |
 Keith Moyer | Cast | Actor | Hospital Visitor (uncredited) | 1 |
Kenny Shapiro | Cast | Lawyer | 1 | |
Andrea Bertola Shaw | Cast | Street Walker (uncredited) | 1 | |
Michael Phelan | Cast | Actor | Pallbearer #2 | 1 |
Adelia Saunders | Cast | Actress | Kim | 2 |
Jamie Bonelli | Cast | Nadine | 3 | |
| Person | Type | Job | Role(s) | Episodes |
