Series Cast 35

1. 

   John Benjamin Hickey

   Frank Winter (10 Episodes)

2. 

   Olivia Williams

   Liza Winter (10 Episodes)

3. 

   Ashley Zukerman

   Charlie Isaacs (10 Episodes)

4. 

   Rachel Brosnahan

   Abby Isaacs (10 Episodes)

5. 

   Harry Lloyd

   Paul Crosley (10 Episodes)

6. 

   Katja Herbers

   Helen Prins (10 Episodes)

7. 

   Michael Chernus

   Louis "Fritz" Fedowitz (10 Episodes)

8. 

   Christopher Denham

   Jim Meeks (10 Episodes)

9. 

   William Petersen

   Col. Emmett Darrow (10 Episodes)

10. 

    Mamie Gummer

    Nora (6 Episodes)

11. 

    Jason Ralph

    Stan (6 Episodes)

12. 

    Daniel London

    J. Robert Oppenheimer (5 Episodes)

13. 

    Bill Camp

    William Hogarth (4 Episodes)

14. 

    Stafford Douglas

    Thatcher (4 Episodes)

15. 

    Griffin Dunne

    Woodrow Lorentzen (4 Episodes)

16. 

    Richard Schiff

    Occam (3 Episodes)

17. 

    Jefferson White

    Cole (3 Episodes)

18. 

    Corey Allen

    Theodore Sinclair (3 Episodes)

19. 

    Audrey Moore

    Francine (3 Episodes)

20. 

    Peter Stormare

    Lazar (3 Episodes)

21. 

    Danny Winn

    Scientist Brock (3 Episodes)

22. 

    Jason Weiler

    Scientist #2 / Finney (1 Episode), Finney (1 Episode)

23. 

    Fiona Dourif

    Jean Tatlock (voice) (1 Episode), Jean Tatlock (1 Episode)

24. 

    Neve Campbell

    Kitty Oppenheimer (2 Episodes)

25. Jessica Osbourne

    Constance Faraday (1 Episode), Constance (1 Episode)

26. 

    Justin Kirk

    Joseph Bucher (2 Episodes)

27. 

    Shylo Molina

    Featured Child (1 Episode)

28. 

    Jonny Coyne

    Dr. Alek Barath (1 Episode)

29. 

    Michael O'Neill

    Psychiatrist (1 Episode)

30. 

    Travis Hammer

    O'Byrne (1 Episode)

31. 

    Tony Devon

    Omar (1 Episode)

32. 

    Joanne Camp

    Oppenheimer's Secretary (1 Episode)

33. 

    Catherine Haun

    Dot (1 Episode)

34. 

    Brad Garrett

    Eli Isaacs (1 Episode)

35. 

    Tad Jones

    Major Pellegrin (1 Episode)

Series Crew 27