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 6

1. 

   Shannon Sturges

   Cherie Hechler

2. 

   Larry Joshua

   Chet

3. 

   Joe Penny

   Les Van Buren

4. 

   Fredric Lehne

   Reggie Flood

5. 

   Dorian Harewood

   Captain Ronald Hicks

6. Paul Moyer

   Paul Moyer

Crew 2