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 26

1. 

   Annaleigh Ashford

   Betty DiMello

2. 

   Mae Whitman

   Patient

3. 

   Lauren Weedman

   Quadruplets' Mother

4. 

   Nicholle Tom

   Maureen

5. Sara Rae Foster

   Dottie

6. 

   Ellen Wroe

   Ginger

7. 

   Bobby Campo

   Carl

8. 

   David Ury

9. Simone Carter

   Arda

10. 

    Clark Freeman

    Operating Doctor #1

11. Natasha Sims

    Operating Nurse

12. Ori Kalmus

    Reporter

13. William Nicol

    Operating Doctor #2

14. 

    Casey Dolkas

    Photographer

15. 

    Cleo Fraser

    Vivian Scully

16. Adam Maurer

    Med Student (uncredited)

17. 

    Barrett Perlman

    Prostitute (uncredited)

18. Evie Ryland

    Nursery Visitor (uncredited)

19. Leah Shaw

    Prostitute (uncredited)

20. Jorie Stern

    Nurse (uncredited)

21. 

    Finn Wittrock

    Dale

22. 

    Marlane Barnes

    Gladys

23. 

    Jennifer Holloway

    Ramona

24. 

    Julianne Nicholson

    Dr. Lillian DePaul

25. 

    Greg Grunberg

    Gene Moretti

26. 

    Beau Bridges

    Dr. Barton Scully

Crew 2