Dom Irrera is a stand up comedian, and also hosts his own podcast called "Dom Irrera Live from The Laugh Factory."

Shooter Jennings is a musician, radio host, record label president, and is also the son of country music legend Waylon Jennings.

Gad Saad is Professor of Marketing & Concordia University Research Chair in Evolutionary Behavioral Sciences and Darwinian Consumption and author of "The Evolutionary Bases of Consumption" and "The Consuming Instinct"

Joe is joined by Eddie Bravo and the hosts from "The Fighter & The Kid" podcast, Brendan Schaub & Bryan Callen, to watch the fights on Sept. 20, 2014.

Graham Hancock is an English author and journalist, well known for books such as "Fingerprints Of The Gods" & "Entangled" and also a new fiction book called "War God"

Joe DeRosa is an American stand-up comedian, actor, producer, director, editor and writer. Look for his podcast available at JoeDeRosaComedy.com and also check out his new album "Mistakes Were Made: The B-Sides out now on iTunes.

Scroobius Pip is a UK spoken word poet and hip hop recording artist. Check out his latest release "Live at Edinburgh Fringe" available on iTunes.

Steven Rinella is an outdoorsman, author, and television host. He currently hosts MeatEater on the Sportsman Channel.

Matt Fulchiron is a stand-up comedian and also hosts his own podcast called "The Full Charge Power Hour"

Jimmy Smith and Ian "Uncle Creepy" McCall join Joe to watch the fight on the evening of June 28, 2014.

Michael Stevens created the YouTube channel VSauce, where "mind-blowing facts & The Best of The Internet" is shared. https://www.youtube.com/Vsauce/

Ms. Pat is a stand-up comedienne.

Float Lab Technologies specializes in designing and manufacturing high-quality Floatation Chambers. A Float Lab floatation chamber provides a light- and sound-free environment.

Sam Harris is a neuroscientist and author of the New York Times bestsellers, The End of Faith, Letter to a Christian Nation, and The Moral Landscape. His latest book "Waking Up: A Guide to Spirituality without Religion" is available now.

Joe is joined by Joey Diaz and the hosts from "The Fighter & The Kid" podcast, Brendan Schaub & Bryan Callen, to watch the fights on July 16, 2014.