1. Whoopi Goldberg

Academy Award-winner and comic Whoopi Goldberg joins Neil deGrasse Tyson.

2. Mayim Bialik

3. Man on Wire

4. Time Travel

5. Brian Greene

6. Robert Kirkman and The Walking Dead

7. Jeremy Irons

8. The Martian

Host Neil deGrasse Tyson interviews best-selling author Andy Weir.

9. Ben Stiller

10. Buzz Aldrin

11. Terry Crews

12. Jay Leno

Host Neil deGrasse Tyson features his interview with comedian and car enthusiast Jay Leno.

13. William Shatner

Host Neil deGrasse Tyson features his interview with iconic actor William Shatner.

14. US Secretary of Defense Ash Carter

Host Neil deGrasse Tyson features his interview with Secretary of Defense Ash Carter.

15. Hope Solo

Host Neil deGrasse Tyson features his interview with soccer goalie Hope Solo.

16. Search for Aliens

Host Neil deGrasse Tyson features his interview with astronomer Jill Tarter.

17. The Science of Weather

Neil deGrasse Tyson features his interview with NOAA Administrator Kathryn D. Sullivan.

18. Science of Game of Thrones

Host Neil deGrasse Tyson features his interview with "Game of Thrones" actor Isaac Wright.

19. Herbie Hancock and Wayne Shorter

Neil deGrasse Tyson interviews jazz icons Herbie Hancock and Wayne Shorter and discusses the art and science of jazz with his studio co-hosts.

20. Bill Maher

Host Neil deGrasse Tyson features his interview with comedian Bill Maher and discusses satire in society with Maeve Higgins and Dr. Alison Dagnes.