1. Lance Armstrong

Neil deGrasse Tyson features his interview with Lance Armstrong and discusses the science of cycling with Scott Adsit, Max Glaskin, and Arthur Caplan.

2. Kareem Abdul-Jabbar

Neil deGrasse Tyson features his interview with Kareem Abdul-Jabbar and discusses the science of basketball with Chuck Nice and Charles Liu.

3. Jane Goodall

Neil deGrasse Tyson features his interview with Jane Goodall and discusses chimpanzee behavior with Chuck Nice and Jill Pruetz.

4. Katie Couric

Neil deGrasse Tyson features his interview with Katie Couric and discusses the intersection of science and journalism with Eugene Mirman and Jeff Jarvis.

5. Kevin Smith

Neil deGrasse Tyson features his interview with Kevin Smith and discusses science fiction and the science of superheroes with Chuck Nice and Charles Liu.

6. SciFi Meets National Defense

Host Neil deGrasse Tyson features his interview with former head of DARPA Arati Prabhakar.

7. Katy Perry

8. Sylvia Earle, Fabien Cousteau & Adrian Grenier

9. James Cameron

10. Celestial Navigation

11. Salman Rushdie

Neil deGrasse Tyson interviews Salman Rushdie and explores the science of storytelling with comedian Eugene Mirman and literary scholar Jonathan Gottschall.

12. Interstellar Space Travel

Neil deGrasse Tyson features his interview with Mae Jemison and discusses the challenges of interstellar travel with Godfrey and Lawrence Krauss.

13. Alan Alda

Neil deGrasse Tyson features his interview with Alan Alda and discusses science communication with Matt Kirshen and Heather Berlin.

14. Stephen Colbert

Neil deGrasse Tyson features his interview with Stephen Colbert and discusses the intersection of science and comedy with Adam Conover and Sophia McClennen.

15. True Story of Hidden Figures

Host Neil deGrasse Tyson interviews author Margot Lee Shetterly ("Hidden Figures: The American Dream and the Untold Story of the Black Women Mathematicians Who Helped Win the Space Race") and actress Janelle Monáe, who starred in the movie.

16. Sam Harris and the Science of Belief

Neil deGrasse Tyson interviews neuroscientist Sam Harris, and discusses everything from free will to religion with Godfrey and Andrew Newberg.

17. Frank Oz and the Science of Puppeteering

Neil deGrasse Tyson features his interview with puppeteer Frank Oz, then discusses puppets in pop culture and the people "behind the curtain" with Adam Conover and Charles Liu.

18. Kelly Slater and the Science of Surfing

Neil deGrasse Tyson features his interview with surfer Kelly Slater, then discusses the science of surfing with Chuck Nice and William Finnegan.

19. Astronaut Scott Kelly

Host Neil deGrasse Tyson features his interview with astronaut Scott Kelly.

20. Stephen Hawking

Host Neil deGrasse Tyson interviews world-renowned physicist Stephen Hawking.