Creator	Role	# of Episodes
Lawrence Krauss Lawrence Krauss is a theoretical physicist and cosmologist who is a professor in... more	Host	87
Ian McEwan Ian Russell McEwan is an English novelist and screenwriter.	Guest	1
Stephen Greenblatt Stephen Greenblatt is a Shakespearean, literary historian, and author. He has se... more	Guest	1
Maryam Namazie Maryam Namazie (Persian: مریم نمازی; born 1966) is a British-Iranian secularist,... more	Guest	1
Penn Jillette Penn Jillette is a writer and producer known for Penn & Teller: Bullshit!, Penn ... more	Guest	1
Gail Collins Gail Collins is an American journalist, op-ed columnist, and author. She is also... more	Guest	1
Ayaan Hirsi Ali Ayaan Hirsi Ali is an activist, feminist, author, scholar, and former politician... more	Guest	1
Alan Stern Alan Stern is an engineer and planetary scientist.	Guest	1
Jennifer Finney Boylan Jennifer Boylan is an author, transgender activist, and reality television perso... more	Guest	1
Noam Chomsky Chomsky is most prolific political thinker of our time as well as the father of ... more	Guest	1
Ricky Gervais Ricky Dene Gervais (; born 25 June 1961) is an English stand-up comedian, actor,... more	Guest	1
David Frum David Frum is a political commentator and senior editor at The Atlantic.... more	Guest	2
Tim Palmer Tim Palmer is Royal Society Research Professor in Climate Physics, and a Senior ... more	Guest	1