Stała obsada sezonu 12

1. 

   Tom Selleck

   Frank Reagan

2. 

   Donnie Wahlberg

   Danny Reagan

3. 

   Bridget Moynahan

   Erin Reagan-Boyle

4. 

   Will Estes

   Jamie Reagan

5. 

   Len Cariou

   Henry Reagan

6. 

   Vanessa Ray

   Eddie Reagan

7. 

   Andrew Terraciano

   Sean Reagan

8. 

   Gregory Jbara

   Garrett Moore

9. 

   Robert Clohessy

   Sid Gormley

10. 

    Abigail Hawk

    Abigail Baker

11. 

    Marisa Ramirez

    Maria Baez

12. 

    Steve Schirripa

    Anthony Abetemarco

Goście specjalni 15

1. 

   Max Weinberg

   Mario Vangelis

2. Erick Betancourt

   Leo Stutz

3. 

   Marcus Giamatti

   Gerry Gertz

4. 

   Erin Leigh Peck

   Donna Spence

5. 

   Ryan Woodle

   Arty Kangiser

6. 

   Claudia Logan

   K.J.

7. 

   Jen Jacob

   Amber Zazzarino

8. 

   Tom Galantich

   Robert Spence

9. Caitlin Hammond

   Grace Spence

10. Justin S Kirkland

    Officer Burgess

11. 

    Chris Santangelo

    Roy Dupree

12. 

    Ian Quinlan

    Luis Badillo

13. Chris Anthony Hernandez

    Man In Crowd

14. Nancy Evans

    Waitress (Joanie)

15. Shawn K. Jain

    ER Doc

Ekipa 2