Boomtown

Donnie Wahlberg

Detective Joel Stevens (24 episodes)

Neal McDonough

Assistant District Attorney David McNorris (24 episodes)

Mykelti Williamson

Police Department Detective II Bobby 'Fearless' Smith (24 episodes)

Gary Basaraba

Police Department Police Officer III Ray Hechler (24 episodes)

Lana Parrilla

Teresa Ortiz, paramedic in season one, rookie police officer in season two (24 episodes)

Jason Gedrick

Police Department Police Officer II Tom Turcotte (24 episodes)

Nina Garbiras

Andrea Little, a reporter (season one) (18 episodes)

Megan Ward

Kelly Stevens (7 episodes)

Vanessa Williams

Detective Katherine Pierce (6 episodes)

Dorian Harewood

Captain Ronald Hicks (6 episodes)

Kelly Rowan

Marian McNorris (3 episodes)

Chase Ellison

Willie Stevens (2 episodes)

Kelly Hu

Rachel Durrel (2 episodes)

Matt Craven

Dr. Michael Hirsch (2 episodes)

Kim Murphy

Susan (2 episodes)

Rick Gomez

Detective Daniel Ramos (2 episodes)

David Proval

Paul Turcotte (2 episodes)

Nathan West

Zack Berman (1 episode)

Kevin Dunn

Ron Berman (1 episode)

Megan Henning

Emily (1 episode)

Stacy Keach

Jack 'Mac' McNorris (1 episode)

Kate Flannery

Tracey (1 episode)

Wade Williams

Paul Barnes (1 episode)

Jason George

Thomas Paltrow (1 episode)

Derek Hamilton

Jimmy Black (1 episode)

Mark Moses

Don Schneider (1 episode)

Rebecca Lowman

Lisa (1 episode)

Silas Weir Mitchell

Erik Sorenson (1 episode)

Daniel Zacapa

Carlos Ramirez (1 episode)

Beau Billingslea

Police Academy Commandant (1 episode)

Ken Davitian

Jewelry Store Owner (1 episode)

Doug Hutchison

Wally Pollard (1 episode)

Lombardo Boyar

Eddie (1 episode)

Anthony Montgomery

Recruit Dwight Baker (1 episode)

Dakota Floeter

Young Wally Pollard (1 episode)

Mark Totty

Chip Pollard (1 episode)

Josh Myler

Courier (1 episode)

Peter Trencher

Coroner (1 episode)

Christian Camargo

Bradley Dawson (1 episode)

Christopher Gorham

Gordon Sinclair (1 episode)

Kirk Trutner

Homeless Man (1 episode)

Neil Patrick Harris

Peter Corman (1 episode)

Cody Kasch

Trevor 'T.J.' Jankowski Jr. (1 episode)

Trent Cameron

Bernie Leonard (1 episode)

Nigel Gibbs

Alex Leonard (1 episode)

Arlen Escarpeta

Cantrel LaFontaine (1 episode)

Marquise Wilson

Friend #3 (1 episode)

Paige Hurd

Grace Adams (1 episode)

Kristin Bauer

Prostitute (1 episode)

Garikayi Mutambirwa

Friend #2 (1 episode)

Brian Sites

Taylor Gates (1 episode)

Kathleen Wilhoite

Sally McBride (1 episode)

Salvator Xuereb

John McBride (1 episode)

Ryan Stockstad

Paramedic (uncredited) (1 episode)

LeVar Burton

Marvin Lloyd (1 episode)

Alimi Ballard

Young Marvin Lloyd (1 episode)

Fran Bennett

Beatrice Rahming (1 episode)

Michael Paul Chan

Lobo Chan (1 episode)

Dempsey Pappion

Young Greg Haymer (1 episode)

Bobby Hosea

Greg Haymer (1 episode)

Bob Clendenin

Doofus (1 episode)

Jennifer Sky

Vanessa Griggs / Laura (1 episode)

Michael Muhney

Chris Griggs (1 episode)

Ramón Franco

Luis Valdoriso (1 episode)

Alia Shawkat

Denise Stein (1 episode)

Erin Daniels

Officer Karen Crane (1 episode)

Mimi Paley

Rachel Stein (1 episode)

Gina Hecht

Doreen Stein (1 episode)

Joe Spano

Henry Stein (1 episode)

Cullen Douglas

Arnold Rabjohn (1 episode)

Ray Laska

Edward Nelson (1 episode)

Virginia Madsen

Erika Ashland (1 episode)

Howard Hesseman

Mel Castle (1 episode)

Katee Sackhoff

Holly (1 episode)

Lisa Cerasoli

Mia Lang (1 episode)

Jessica Lundy

Vivian Colson (1 episode)

Dan Byrd

Eddie Colson (1 episode)

Ali Hillis

Melanie Stone (1 episode)

Gregg Henry

Robert Colson (1 episode)

David Burke

Jay Colson (1 episode)

Kim Rhodes

Julia Sloane (1 episode)

Gregory White

Judge Harold Denby (1 episode)

Raja Fenske

Puppet (1 episode)

Robert Wisdom

Chronic (Daryl C. Norcott) (1 episode)

Dayo Ade

Banger (1 episode)

Robert LaSardo

Pope (1 episode)

Frank John Hughes

Officer Vincent Manzani (1 episode)

Christopher Kriesa

Warden Frank Collins (1 episode)

Rino Romano

Paul Turcotte in 1976 (1 episode)

Alexander Gould

Tom at 8 (1 episode)

Tracey Walter

Dwayne (1 episode)

Tommy Hinkley

Mr. Flannery (1 episode)

April Grace

Cynthia (1 episode)

Patricia Wettig

Nora Jean Flannery (1 episode)

Richard Erdman

Kevin's Dad (1 episode)

Chris Mulkey

Kevin Van Horn (1 episode)

Henry G. Sanders

Police Sergeant Miller (1 episode)

Tyler Christopher

Holden McKay (1 episode)

Loren Lester

Homeowner (1 episode)

David Dunard

Irate Grandfather (1 episode)

Wendy Schaal

Darlene Beechem (1 episode)

Miguel A. Núñez Jr.

Freaktown (1 episode)

Ernie Grunwald

Charlie Graham (1 episode)

Annika Peterson

Katrina (1 episode)

Demetra Raven

Lara (1 episode)

Shannon Sturges

Cherie Hechler (1 episode)

Larry Joshua

Chet (1 episode)

Joe Penny

Les Van Buren (1 episode)

Fredric Lehne

Reggie Flood (1 episode)

Paul Moyer

Paul Moyer (1 episode)

Christopher Gartin

Jonny Rand (1 episode)

Sheeri Rappaport

Janice Edwards (1 episode)

Beth Grant

Landlady (1 episode)

John Kapelos

Hugo Pinkston (1 episode)

Rick Ravanello

Sean Dornan (1 episode)

Alex Meneses

Vicki Pineda (1 episode)

J. C. Brandy

Chandler (1 episode)

Stephen Macht

John Donadoni (1 episode)

Michael Dempsey

Recovering drunk (1 episode)

Jon Avnet

Producer (18 episodes), Executive producer (6 episodes)

Graham Yost

Producer (18 episodes), Executive producer (6 episodes)

Stephen Sassen

Producer (6 episodes)

Javier Grillo-Marxuach

Producer (6 episodes)

Fred Golan

Producer (6 episodes)

Philip Giffin

Music (6 episodes)

Craig Kuehne

Visual Effects (6 episodes)

Jon Avnet

Director (8 episodes)

Peter Werner

Director (2 episodes)

Alex Zakrzewski

Director (1 episode)

Rodrigo García

Director (1 episode)

Michael W. Watkins

Director (1 episode)

Kevin Hooks

Director (1 episode)

Tucker Gates

Director (1 episode)

Bobby Roth

Director (1 episode)

Jeremy Kagan

Director (1 episode)

Graham Yost

Writer (4 episodes)

Laurence Andries

Writer (3 episodes)

Javier Grillo-Marxuach

Writer (1 episode)

Clyde Phillips

Writer (1 episode)

Chris Brancato

Writer (1 episode)