Penn Radio was an hour-long talk CBS radio show which ran from January 3, 2006 to March 2, 2007, hosted by Penn Jillette and Michael Goudeau and produced by "Happy" Jack Landreth and Patrick DiFazio. It was broadcast on the Free FM brand radio stations (usually) live, with theme music by Mike Jones.

The show dealt with topics in the news regarding science, skepticism, religion, entertainment and politics. Jillette promoted his libertarian and atheist perspectives from the "nut point of view" to encourage listeners to call and email with their stories and opinions about the topic. Early shows tended to be without structure, with Jillette and Goudeau talking about whatever came to mind, taking the occasional caller and reading the occasional email. Later shows had tended to formalize around a current topic and a call-in talk show format.

Jillette and Goudeau would usually broadcast from Jillette's Vegas area home ("The Slammer"). The broadcast was done from Jillette's personal recording studio, Vintage Nudes Studio.

Trey Parker (born Randolph Severn Parker III; October 19, 1969) is an American actor, voice artist, animator, screenwriter, director, producer and musician, best known for being the co-creator of South Park along with his creative partner and best friend Matt Stone.

Parker started his film career in 1992, making a holiday short titled Jesus vs. Frosty. His first success came from Cannibal! The Musical. From there he made another short titled Jesus vs. Santa, which led him and college friend Stone to create South Park, which began airing on television in 1997. He has won four Emmy Awards for his role in South Park, winning for both "Outstanding Programming More Than One Hour" and "Outstanding Programming Less Than One Hour".

He co-wrote and co-directed the 2011 multi-Tony Award winning musical The Book of Mormon.

Douglas Gene "Doug" Stanhope (born March 25, 1967) is an American stand-up comedian, actor, and author known for his on-stage drinking and abrasive comedy routines.

Stanhope quit high school after his freshman year. His comedy career began in 1990 in Las Vegas.

Stanhope has made appearances at several major comedy festivals, including the Montreal Just For Laughs, US Comedy Arts Festival in Aspen, Colorado, the Chicago Comedy Festival and the Edinburgh Festival Fringe in Scotland, where he won the Strathmore Press Award in 2002.

Stanhope was the winner of the 1995 San Francisco International Comedy Competition where he edged out notable comedic actor Dane Cook in a three-week contest. He's appeared in dozens of national and international standup comedy television specials. He claims that his appearance on the BBC television show, Live Floor Show, (broadcast March 20, 2003) was fueled by "ecstasy". According to Stanhope, "TV is just for the money; live performance is where it’s at."

In 2003 and 2004, Stanhope co-hosted the fifth and sixth seasons of The Man Show with Joe Rogan.

James Randi (born Randall James Hamilton Zwinge; August 7, 1928) is a Canadian-American stage magician and scientific skeptic best known as a challenger of paranormal claims and pseudoscience. Randi is the founder of the James Randi Educational Foundation (JREF). Randi began his career as a magician named The Amazing Randi, but after retiring at age 60, he began investigating paranormal, occult, and supernatural claims, which he collectively calls "woo-woo".

Although often referred to as a "debunker", Randi rejects that title owing to its perceived bias, instead describing himself as an "investigator". He has written about the paranormal, skepticism, and the history of magic. He was a frequent guest on The Tonight Show Starring Johnny Carson and was occasionally featured on the television program Penn & Teller: Bullshit!. The JREF sponsors The One Million Dollar Paranormal Challenge offering a prize of US$1,000,000 to eligible applicants who can demonstrate evidence of any paranormal, supernatural or occult power or event under test conditions agreed to by both parties.

Penn Fraser Jillette (born March 5, 1955) is an American illusionist, comedian, musician, and best-selling author known for his work with fellow magician Teller in the team Penn & Teller, and advocacy of atheism, scientific skepticism, libertarianism and free market capitalism.

Jillette was born in Greenfield, Massachusetts. His mother, Valda R. Jillette (née Parks) (November 8, 1909 – January 1, 2000), was a secretary, and his father, Samuel H. Jillette (March 14, 1912 – February 14, 1999), worked at Greenfield's Franklin County Jail. Jillette became disenchanted with traditional illusionist acts that presented the craft as authentic magic, such as The Amazing Kreskin on The Tonight Show Starring Johnny Carson. At age eighteen, he saw a show by illusionist James Randi, and became enamored of his approach to magic that openly acknowledged deception as entertainment rather than a mysterious supernatural power. Jillette regularly acknowledges Randi as the one person on the planet he loves the most besides members of his family.