Series Cast 49

1. 

   Denis Leary

   Tommy Gavin (13 Episodes)

2. 

   James McCaffrey

   James 'Jimmy' Keefe (13 Episodes)

3. 

   Andrea Roth

   Janet Gavin (13 Episodes)

4. 

   Jack McGee

   Jerry Reilly (13 Episodes)

5. 

   John Scurti

   Kenneth 'Lou' Shea (13 Episodes)

6. 

   Daniel Sunjata

   Franco Rivera (13 Episodes)

7. 

   Michael Lombardi

   Mike Silletti (13 Episodes)

8. 

   Steven Pasquale

   Sean Garrity (13 Episodes)

9. 

   Charles Durning

   Michael Gavin (10 Episodes)

10. 

    Lenny Clarke

    Uncle Teddy (6 Episodes)

11. 

    Jarah Mariano

    Jarah (5 Episodes)

12. 

    Paula Devicq

    Sondra (4 Episodes)

13. 

    James Badge Dale

    Timothy Gavin (3 Episodes)

14. 

    Siobhan Fallon Hogan

    Phyllis (3 Episodes)

15. 

    Ashlie Atkinson

    Theresa (3 Episodes)

16. 

    David Walton

    — (2 Episodes)

17. 

    Matthew Arkin

    Dr. Thompkins (2 Episodes)

18. 

    Kristina Apgar

    Nicole (2 Episodes)

19. 

    Patricia Velásquez

    — (2 Episodes)

20. Lyndon Byers

    Ryan (2 Episodes)

21. 

    Neal Jones

    Peter (2 Episodes)

22. Greg D'Agostino

    — (2 Episodes)

23. 

    Jill Latiano Howerton

    Geneva (2 Episodes)

24. Russ Anderson

    Bobby "Teflon" Teff (2 Episodes)

25. 

    Kaitlin Hopkins

    — (1 Episode)

26. 

    Bryan Batt

    — (1 Episode)

27. 

    Idina Menzel

    — (1 Episode)

28. 

    Nick Di Paolo

    — (1 Episode)

29. 

    Julie White

    Dr. Goldberg (1 Episode)

30. 

    Brian McNamara

    Passing Fireman (1 Episode)

31. Ric Sechrest

    — (1 Episode)

32. 

    Curtiss Cook

    Project Resident (1 Episode)

33. John Sica

    — (1 Episode)

34. 

    Bruce Altman

    — (1 Episode)

35. 

    Gerry Bamman

    — (1 Episode)

36. Gordon Ramsey

    — (1 Episode)

37. 

    Cynthia Harris

    — (1 Episode)

38. 

    Robert Turano

    — (1 Episode)

39. 

    Stephen Singer

    — (1 Episode)

40. 

    Michael Mulheren

    Chief Perolli (1 Episode)

41. Ed Sullivan

    Billy Warren (1 Episode)

42. 

    Anthony Mangano

    Bobby (1 Episode)

43. Kevin Hagan

    Captain Sweeney (1 Episode)

44. Chester A. Sims II

    Mr. Wilmore (1 Episode)

45. Natalie Distler

    Colleen Gavin (1 Episode)

46. 

    Trevor Heins

    Connor Gavin (1 Episode)

47. 

    Olivia Crocicchia

    Katy Gavin (1 Episode)

48. 

    Jay Potter

    Roger Mills (1 Episode)

49. 

    Virginia Louise Smith

    Lisa (1 Episode)

Series Crew 14