Inside ISIS, the powerful new extremist group fueled by an ancient Muslim feud. Also: religious liberty vs. Obamacare, and a new novel on 19th century Shakers.

Now 72, the revered Protestant theologian reflects on his own evolution towards a humbler faith. And will the Old Gods and the Lord of the Light in 'Game of Thrones' ever become 'real' religions?

Is yoga hiding nefarious metaphysical ideas? Two sides weigh in. And sparrows, eagles, doves and pigeons--finding meaning in the birds of the Bible.

Why France is cracking down on religions it considers cults, and we get a private concert from French-American guitarist Stephane Wrembel. Plus, the Pope's visit to the Holy Land.

Answer: saying you don't is still a taboo in America. Also, the early Jesuits who tried to ban calculus, and we go inside a denominational squabble in Satanism.

The extremist theology fueling one of the most violent terrorist groups in the world. Also, is mindfulness meditation becoming just another heath practice? And we meet Father Bill Miller, priest and bar owner.

Now you can start a government meeting with a Christian prayer - or any sectarian prayer. Two sides debate the Supreme Court ruling. And why one of the most revered people in Nepal is a 7-year-old girl.

WWI as a holy war: from soldier sightings of angels on the battlefield, to propaganda about the looming apocalypse. And a Harvard psychologist explains the 'us vs. them' problem

The lightening-speed canonization of two popes at the same time; why the sainthood requirement include proof of two miracles; and a new class at Berkeley called "Buddhist Economics"

After the Kansas shootings - is this really about anti-Semitism? Also: the creative genius behind The New Yorker cartoons says humor is bad for religion, and Barbara Ehrenreich turns inward for a metaphysical memoir