Recurring Guest Characters Comedian 11 guest appearances Chuck Nice 8 guest appearances Bill Nye 6 guest appearances Charles Liu 4 guest appearances Physicist 3 guest appearances Penn & Teller 2 guest appearances Eugene Mirman 2 guest appearances Jonathan Gottschall 2 guest appearances Anthropologist 2 guest appearances Journalism Professor 2 guest appearances Adam Conover 2 guest appearances Astronaut 2 guest appearances Janna Levin 2 guest appearances Paula Poundstone 2 guest appearances Kate Marvel 2 guest appearances Guest 1 guest appearances George Takei 1 guest appearances Christopher Nolan 1 guest appearances Dan Savage 1 guest appearances Arianna Huffington 1 guest appearances ⇤ « 1 2 3 4 5 » ⇥