Commentator-comic Bill Maher plays devil's advocate with religion as he talks to believers about their faith. Traveling around the world, Maher examines the tenets of Christianity, Judaism and Islam and raises questions about homosexuality, proof of Christ's existence, Jewish Sabbath laws, violent Muslim extremists.

Cast: Bill Maher, Jose Luis De Jesus Miranda, Andrew Newberg, Steve Burg, Tal Bachman, Jonathan Boulden