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 17

1. 

   Teddy Sears

   Dr. Austin Langham

2. 

   Kevin Christy

   Lester Linden

3. 

   Sam McMurray

   Mr. Avery

4. 

   Grant Harvey

   Martin O'Reilly

5. 

   Whitney Anderson

   Cookie

6. 

   Lauran September

   Emily Hopkins

7. Charlotte Bayne

   Melanie

8. Adriane Cade

   Gambler (uncredited)

9. 

   Jenine Giusto

   Surrogate Candidate (uncredited)

10. Alycen Malone

    Stripper (uncredited)

11. 

    Benjamin Koldyke

    Paul Edley

12. 

    Emily Kinney

    Nora Everett

13. 

    Heléne Yorke

    Jane Martin

14. 

    Josh Charles

    Dan Logan

15. 

    Rob Benedict

    Jonathan Laurents

16. 

    Sarah Silverman

    Helen Schiff

17. 

    Beau Bridges

    Dr. Barton Scully

Crew 1