Creator	Role	# of Episodes
John Green John Green is an author, vlogger, producer, and educator.	Host	412
Hank Green Hank Green is an entrepreneur, musician, educator, producer, vlogger, and author... more	Host	412
Rosianna Halse Rojas	Producer	411
Josef "Tuna" Metesh Josef "Tuna" Metesh is a sound designer at Complexly and editor for the Dear Han... more	Editor	411
Katherine Green	Guest	1
Andrew Levitt Andrew Levitt is an American drag queen, actor, and singer. He is also known as ... more	Guest	1
Jacob Goldstein Author of Money: The True Story of a Made-Up Thing. Formerly @planetmoney. Host... more	Guest	1
Ceri Riley Ceri Riley is a content manager and editorial assistant of the crash course.... more	Guest	1
Deboki Chakravarti Deboki Chakravarti is a freelance science writer and multimedia producer.... more	Guest	2
Roman Mars Roman Mars is a radio producer. He is the host and producer of 99% Invisible and... more	Guest	2
Brennan Lee Mulligan Brennan Lee Mulligan is an improviser, writer, and actor hailing from the mean s... more	Guest	1
Travis McElroy Travis Patrick McElroy is an American podcaster. He is known for his work on pod... more	Guest	1
Emily Graslie Emily Graslie is an American science communicator and YouTube educator. She star... more	Guest	1
Zach Kornfeld Zach Kornfeld is a video producer, actor, comedian, and screenwriter.... more	Guest	1
Ashley C. Ford Ashley C. Ford is a writer, podcaster, and educator who deals with topics includ... more	Guest	1
Randall Munroe Randall Patrick Munroe is an American cartoonist, author, engineer, scientific t... more	Guest	1
Dr. Aaron Carroll Dr. Aaron Carroll is a pediatrician and Professor of Pediatrics at the Indiana U... more	Guest	1
Jess Zafarris Jess Zafarris is an author.	Guest	1
Flula Borg Flula Borg is a YouTube personality, actor, musician, comedian, DJ, singer, song... more	Guest	1
Jenny Owen Youngs Jenny Owen Youngs is a singer-songwriter, natural history enthusiast and co-host... more	Guest	1