Season Regulars 4

1. 

   Michael Sheen

   William Masters

2. 

   Lizzy Caplan

   Virginia Johnson

3. 

   Caitlin FitzGerald

   Libby Masters

4. 

   Annaleigh Ashford

   Betty DiMello

Guest Stars 20

1. 

   Teddy Sears

   Dr. Austin Langham

2. 

   Kevin Christy

   Lester Linden

3. 

   Laura Silverman

   Stephanie

4. 

   Jerry O'Donnell

   Jack Coleridge

5. Blake Morgan Ferris

   Dennis

6. Bonnie Bower

   Wendy

7. 

   Isabella Alexander

   Girl

8. Clara James Daly

   Girl 2

9. Hillary F. Brown

   Study Woman #1

10. Candice Rans

    Study Woman #2

11. Kelsey Ritter

    Study Woman #5

12. 

    Lisa Temple

    Study Woman #6

13. 

    Mariana Tosca

    Study Woman #3

14. 

    Elizabeth Regen

    Mrs. Doughtry (uncredited)

15. 

    Benjamin Koldyke

    Paul Edley

16. 

    Emily Kinney

    Nora Everett

17. 

    Colin Woodell

    Ronald Sturgis

18. 

    Josh Charles

    Dan Logan

19. 

    Sarah Silverman

    Helen Schiff

20. 

    Jaeden Martell

    Johnny Masters

Crew 2