Season Regulars 7

1. 

   Donnie Wahlberg

   Detective Joel Stevens

2. 

   Neal McDonough

   Assistant District Attorney David McNorris

3. 

   Mykelti Williamson

   Police Department Detective II Bobby 'Fearless' Smith

4. 

   Gary Basaraba

   Police Department Police Officer III Ray Hechler

5. 

   Nina Garbiras

   Andrea Little, a reporter (season one)

6. 

   Lana Parrilla

   Teresa Ortiz, paramedic in season one, rookie police officer in season two

7. 

   Jason Gedrick

   Police Department Police Officer II Tom Turcotte

Guest Stars 5

1. 

   Wendy Schaal

   Darlene Beechem

2. 

   Miguel A. Núñez Jr.

   Freaktown

3. 

   Ernie Grunwald

   Charlie Graham

4. 

   Annika Peterson

   Katrina

5. Demetra Raven

   Lara

Crew 1