Tommy Gavin

Denis Leary

Janet Gavin

Andrea Roth

James 'Jimmy' Keefe

James McCaffrey

Franco Rivera

Daniel Sunjata

Mike Silletti

Michael Lombardi

Lt. Kenny `Lou' Shea

John Scurti

Sean Garrity

Steven Pasquale

Chief "Needles" Nelson

Adam Ferrara

Sheila Keefe / —

Callie Thorne

Bart 'Black Shawn' Johnston

Larenz Tate

Chief Feinberg

Jerry Adler

Uncle Teddy

Lenny Clarke

Jerry Reilly

Jack McGee

Colleen Gavin

Natalie Distler

Mickey Gavin

Robert John Burke

— / Johnny Gavin

Dean Winters

Guest Star

Raul Torres

Guest Star

Olivia Crocicchia

Guest Star

Michael Zegen

Guest Star

Maura Tierney

Guest Star

Charles Durning

Guest Star

Cody Horn

Niels

Niels Jorgensen

Maggie Gavin

Tatum O'Neal

Paulie

Paul Martinowicz

Guest Star

Lord Jamar

Guest Star

Geneva Carr

Laura Miles

Diane Farr

Guest Star

Lee Shepherd

Homeless Guy

Martin Pfefferkorn

Guest Star

Xosha Roquemore

Guest Star

Robert Cameron

Guest Star

Lawrence Feeney

Guest Star

Kerry Butler

Guest Star

Postell Pringle

—

Kate Burton

Guest Star

Franklin Ojeda Smith

Guest Star

Starla Benford

Guest Star

Sean Mahan

Guest Star

Jennifer Kim

Shopper

Mel House

Guest Star

Daniel Oreskes

Guest Star

Regina Schneider

—

Milena Govich

Guest Star

Joey Auzenne

—

Neal Jones

—

Timothy Adams

—

Ashlie Atkinson

—

Paula Devicq

—

Patti D'Arbanville

Alicia Green

Susan Sarandon

—

Greg D'Agostino

—

Sherri Saum

—

Jarah Mariano

—

Karen Goberman