Les Stroud is a Canadian musician, filmmaker, and survival expert best known as the creator, writer, producer, director, cameraman and host of the television series Survivorman. New episodes of Surivorman begin airing on The Science Channel...

Jim Norton is a stand-up comedian, radio personality, author, and actor. His latest special "Contextually Inadequate" debuts April 24 on Epix.

Bryan Callen is an actor and stand-up comedian, and together with Brendan Schaub he also hosts "The Fighter & The Kid" podcast. http://bryancallen.com

Dean Delray is a stand up comedian. He has his own podcast called "Let There Be Talk" available on iTunes & Stitcher. http://deandelray.com/

Adam Scorgie is an independent filmmaker, most commonly known for his work on The Culture High, The Union: The Business Behind Getting High & Ice Guardians. http://www.theculturehigh.com/

Neal Brennan is a stand-up comedian, actor, writer, director and producer. He is known for co-creating and co-writing "Chappelle's Show" with Dave Chappelle.

Abby Martin is an American journalist and former host of "Breaking the Set" for RT America. Check out her work at http://mediaroots.org

Joe is joined by Brendan Schaub, Bryan Callen, and Tony Hinchcliffe to watch the fights on June 20, 2015. http://podcasts.joerogan.net

Aubrey de Grey is an English author and theoretician in the field of gerontology and the Chief Science Officer of the SENS Research Foundation. http://sens.org/

Brad Williams is an actor and stand-up comedian. Brad has a new special airing May 8 on Showtime called "Brad Williams: Fun Size" and he also hosts his own podcast called "About Last Night" available on iTunes.

Dr. Dan Engle, MD is a practicing psychiatrist, board certified in psychiatry and neurology. Aubrey Marcus is writer, entrepreneur, and adventurer. Some of his writings and experiences can be found on his website, WarriorPoet.us, as well a...

Dominic Monaghan is an English actor, known for his role in "The Lord of the Rings" trilogy and on the tv show "LOST" He also has a wildlife documentary series called "Wild Things with Dominic Monaghan" which airs on the Travel Channel.

Greg Fitzsimmons is a stand-up comedian. He also hosts his own podcast "FitzDog Radio" available on iTunes and every Monday on Sirius Howard 101. http://fitzdogradio.com http://podcasts.joerogan.net

Thaddeus Russell is an adjunct professor of American Studies at Occidental College, and also the author of "A Renegade History of The United States"

Adam Carolla is a comedian, radio personality, television host and actor. Check out his new movie "Road Hard" at roadhardmovie.com http://podcasts.joerogan.net/