Neil deGrasse Tyson interviews world-renowned physicist and cosmologist Stephen Hawking and discusses the mysteries of our universe with comedian Matt Kirshen, cosmologist Janna Levin, and theoretical physicist Michio Kaku. Bill Nye, the Science Guy, also comments.
Guest Cast
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Some guides show this as Season 4, Episode 20, which is the sequence in which it aired. Nat Geo's site now shows it as a special episode, but I suspect this is because Professor Hawking passed away soon after this episode aired.