Probably my two most followed personalities.
From the show's blurb: "Neil deGrasse Tyson interviews neuroscientist Sam Harris, and discusses everything from free will to religion with Godfrey and Andrew Newberg."
(Unfortunately, the broadcast requires some sort of "TV Provider" login. Being in AUS, I have no access to it.)
EDIT: Neil deGrasse Tyson releases clips of StarTalk on YouTube. He may release some of this talk on YouTube in the future.