4 - 1Lance Armstrong Oct. 01, 2017
4 - 2Kareem Abdul-Jabbar Oct. 08, 2017
4 - 3Jane Goodall Oct. 15, 2017
4 - 4Katie Couric Oct. 22, 2017
4 - 5Kevin Smith Oct. 29, 2017
4 - 6SciFi Meets National Defense Nov. 05, 2017
4 - 7Katy Perry Nov. 12, 2017
4 - 8Sylvia Earle, Fabien Cousteau & Adrian Grenier Nov. 19, 2017
4 - 9James Cameron Nov. 26, 2017
4 - 10Celestial Navigation Dec. 03, 2017
4 - 11Salman Rushdie Dec. 10, 2017
4 - 12Interstellar Space Travel Dec. 17, 2017
4 - 13Alan Alda Jan. 07, 2018
4 - 14Stephen Colbert Jan. 14, 2018
4 - 15True Story of Hidden Figures Jan. 21, 2018
4 - 16Sam Harris and the Science of Belief Jan. 28, 2018
4 - 17Frank Oz and the Science of Puppeteering Feb. 04, 2018
4 - 18Kelly Slater and the Science of Surfing Feb. 18, 2018
4 - 19Astronaut Scott Kelly Feb. 25, 2018
4 - 20Stephen Hawking Mar. 04, 2018