Season Regulars 5

1. 

   Michael Sheen

   William Masters

2. 

   Lizzy Caplan

   Virginia Johnson

3. 

   Caitlin FitzGerald

   Libby Masters

4. 

   Nicholas D'Agosto

   Dr. Ethan Haas

5. 

   Teddy Sears

   Dr. Austin Langham

Guest Stars 19

1. 

   Annaleigh Ashford

   Betty DiMello

2. 

   Roslyn Ruff

   Josephine May

3. 

   Margo Martindale

   Miss Horchow

4. 

   Steve Rosen

   Ernie Turk

5. 

   Johanna Day

   Advisor

6. Mary Jo McConnell

   Desk Nurse

7. 

   Jeffrey C. Hawkins

   OR Doctor #1

8. Linda Marie Larson

   Lois Tupps

9. 

   Danae Nason

   Assisting Nurse #1

10. Mark Rosing

    Anesthesiologist

11. 

    Phil McGlaston

    Worker

12. Duncan Bindbeutel

    Doctor at Party (uncredited)

13. Roy Pollack

    Upscale Party Goer (uncredited)

14. Elysia Richards

    Nurse (uncredited)

15. Tanya Wheelock

    College Student (uncredited)

16. Matthew Dean Wood

    Party Guest (uncredited)

17. Jorie Stern

    Nurse (uncredited)

18. 

    Heléne Yorke

    Jane Martin

19. 

    Beau Bridges

    Dr. Barton Scully

Crew 2