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 10

1. 

   Rino Romano

   Paul Turcotte in 1976

2. 

   Alexander Gould

   Tom at 8

3. 

   Tracey Walter

   Dwayne

4. 

   Tommy Hinkley

   Mr. Flannery

5. 

   April Grace

   Cynthia

6. 

   David Proval

   Paul Turcotte

7. 

   Patricia Wettig

   Nora Jean Flannery

8. 

   Richard Erdman

   Kevin's Dad

9. 

   Chris Mulkey

   Kevin Van Horn

10. 

    Henry G. Sanders

    Police Sergeant Miller

Crew 2