Reparto de la serie 51

1. 

   Leslie Kean

   Self – Investigative Journalist (5 episodios)

2. 

   Chris Mellon

   Self – Former Deputy Asst. Secretary of Defense for Intelligence (5 episodios)

3. Mark Rodeghier

   Self – Scientific Director, Center for UFO Studies (CUFOS) (4 episodios)

4. Robert Powell

   Self – Co-Founder, Scientific Coalition for UAP Studies (3 episodios), Self – Former Director of Research, Mutual UFO Network (1 episodio)

5. 

   Luis Elizondo

   Self – Former Counterintelligence Agent (3 episodios)

6. 

   John Podesta

   Self – Former White House Chief of Staff (3 episodios)

7. 

   Derrick Pitts

   Self – Chief Astronomer, The Franklin Institute (3 episodios)

8. 

   J. Allen Hynek

   Self – Scientific Advisor to Project Blue Book (archive footage) (3 episodios)

9. 

   Kirsten Gillibrand

   Self – Senate Armed Services Committee (2 episodios)

10. 

    André Carson

    Self – House Intelligence Subcommittee (2 episodios)

11. 

    David Fravor

    Self – Former Navy Pilot (2 episodios)

12. Alex Dietrich

    Self – Former Navy Pilot (2 episodios)

13. 

    Harry Reid

    Self – Former Senate Majority Leader (2 episodios)

14. Ralph Blumenthal

    Self – Former Staff Reporter, New York Times (2 episodios)

15. 

    Harold Brown

    Self – Secretary of the Air Force (archive footage) (2 episodios)

16. 

    Mark O'Connell

    Self – Author, J. Allen Hynek Biography (2 episodios)

17. 

    Jacques Vallée

    Self – Astronomer & Internet Pioneer (2 episodios)

18. 

    John A. Samford

    Self – Dir. of Intelligence, U.S. Air Force (archive footage) (1 episodio)

19. Chad Underwood

    Self – Former Weapons Systems Officer (1 episodio)

20. Helene Cooper

    Self – New York Times Pentagon Correspondent (1 episodio)

21. 

    Seth Shostak

    Self – Sr. Astronomer, SETI Institute (1 episodio)

22. 

    Neil deGrasse Tyson

    Self – Director, Hayden Planetarium (1 episodio)

23. 

    George W. Bush

    Self (archive footage) (1 episodio)

24. 

    Барак Обама

    Self (archive footage) (1 episodio)

25. Steve Allen

    Self – Private Pilot (1 episodio)

26. Sara Vanden Berge

    Self – Former Managing Editor, Stephenville Empire Tribune (1 episodio)

27. Angelia Joiner

    Self – Local Journalist (archive footage) (1 episodio)

28. Lee Roy Gaitan

    Self – Retired Police Officer (1 episodio)

29. 

    Robert Salas

    Self – Retired Air Force Captain (1 episodio)

30. David Schindele

    Self – Retired Air Force Captain (1 episodio)

31. Robert Jamison

    Self – Retired Air Force Lieutenant (1 episodio)

32. 

    Jimmy Carter

    Self (archive footage) (1 episodio)

33. 

    Стівен Спілберґ

    Self (archive footage) (1 episodio)

34. Jackie Worthington

    Self – Witness, Hudson Valley Wave (1 episodio)

35. Kevin Soravilla

    Self – Retired Police Officer (1 episodio)

36. Dennis Sant

    Self – Witness, Hudson Valley Wave (1 episodio)

37. Debbie Carbone

    Self – Witness, Hudson Valley Wave (1 episodio)

38. Doris Acosta

    Self – Witness, Hudson Valley Wave (1 episodio)

39. Linda Zimmermann

    Self – Author, 'Hudson Valley UFOs' (1 episodio)

40. Richard F. Haines

    Self – Chief Scientist, NARCAP Retired (1 episodio)

41. 

    James Fox

    Self – Filmmaker (1 episodio)

42. John Callahan

    Self – FAA Division Chief, Retired 2011 (1 episodio)

43. Jon Hilkevitch

    Self – Chicago Tribune, Transportation Reporter Retired (1 episodio)

44. Ryan Graves

    Self – Retired Navy Pilot (1 episodio)

45. 

    Джо Байден

    Self (archive footage) (1 episodio)

46. 

    Marco Rubio

    Self – Senate Intelligence Committee Vice Chairman (1 episodio)

47. 

    Tim Burchett

    Self – Tennessee, 2nd District (1 episodio)

48. 

    Garry Nolan

    Self – Professor, Stanford University Dept. of Pathology (1 episodio)

49. 

    Avi Loeb

    Self – Astrophysicist, Harvard University (1 episodio)

50. 

    Jeff Bezos

    Self (archive footage) (1 episodio)

51. 

    Michio Kaku

    Self – Theoretical Physicist (1 episodio)

Equipo de la serie 25