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Season 1

Season 2

Season 3

Season 4

  • S04E01 Why is Consciousness Baffling?

    How does consciousness weave its magical web of inner awareness-appreciating music, enjoying art, feeling love? Even when all mental functions may be explained, the great mystery-what it "feels like" inside-will likely remain.

  • S04E02 What is God Like?

    What can we know about God? The easy answer is "nothing": God is not like anything. But that's not good enough. If there is a God, God must have traits. No?

  • S04E03 What does an Expanding Universe Mean?

    The expanding universe is humanity's monumental discovery. Beginning with something infinitesimally small, the universe has become something majestically large. How could this happen? What could this mean?

  • S04E04 Is the Person All Material?

    What makes a human being a "person?" What provides our sense of unity and continuity? While most people assume that to be a person is to have a soul, most philosophers-and some theologians-believe that persons are all material.

  • S04E05 Arguments Against God?

    All who affirm that God does exist should examine the strong attacks of those who conclude that God does not exist, and then assess the sharp counterattacks of scholarly believers. Belief in God is too important to be determined by cultural circumstances.

  • S04E06 Are there Extra Dimensions?

    Extra dimensions-beyond length, width, height-seem the stuff of science fiction. What would extra dimensions be like? Is time the fourth dimension? Could deep reality be so strange? And, anyway, why would we care?

  • S04E07 Would Intelligent Aliens Undermine God?

    Whether extra-terrestrial intelligences exist has profound implications for human religion. We are either alone or not alone in the universe, but no matter the ultimate answer, theists and atheists will each mold that answer, alone or not alone, to fit their opposing worldviews.

  • S04E08 Did God Create Evil?

    Whoever believes in the existence of God must explain the presence of evil. To theists, it's "the problem of evil," which they struggle to resolve. To atheists, it's "the argument from evil," which they wield like a sword. Moreover, if God is all-powerful and all-knowing, how could God not have created evil?

  • S04E09 Is Mathematics Invented or Discovered?

    Mathematics describes the real world of atoms and acorns, stars and stairs, with remarkable precision. So is mathematics invented by humans-like chisels and hammers and pieces of music? Or is mathematics discovered-always out there, somewhere, like mysterious islands waiting to be found?

  • S04E10 Do Angels and Demons Exist?

    Many theologians take angels and demons seriously. Why? Certainly, most human beings believe in angels and demons. Certainly, such nonphysical beings, in one form or another, populate most of the world's religions.

  • S04E11 Why the Laws of Nature?

    What's real? What's fundamental? There are regularities in nature, things that are or work the same-always, everywhere, across the universe just like in your kitchen. Down deep, what are the laws of nature? What makes them "laws"? And where do they come from?

  • S04E12 What is God's Judgment?

    Every religion thunders its day of reckoning, and to examine God's judgment is to probe God's character and perhaps assess God's existence. If God does not exist, God's judgment may expose it. If God does exist, and assuming God is merciful as well as just, maybe we've missed the meaning of God's Judgment.

  • S04E13 Why the Cosmos?

    The search for meaning and purpose is humanity's never-ending quest. It is said that "How Questions" belong to the realm of science, but "Why Questions" do not. Yet startling scientific discoveries offer radical powers of explanation. Can "Why Questions" belong to science? What about the biggest "Why" of them all?

Season 5

Season 6

Season 7

Season 8

Season 9

Season 10

Season 11

Season 12

Season 13

Season 14

Season 15

Season 16

Season 17

Season 18

Season 19

  • S19E01 What's Philosophy of Cosmology?

    • December 27, 2018
    • PBS

    What is philosophy of cosmology? We search the deepest levels of cosmic reality, the big picture of the puzzle of the universe — beginning, size, structure, future, far future. We seek significance in cosmology, if there’s any to be. Featuring interviews with Barry Loewer, Mario Livio, George F. R. Ellis, and David Albert.

  • S19E02 What's Fine-Tuning in Cosmology?

    • January 3, 2019
    • PBS

    What is fine-tuning in cosmology? Here’s the claim: cosmic conditions that allow complex structures — galaxies, stars, planets, people — depend on a few “constants of nature” lying within tight ranges of values. But is fine-tuning valid? Featuring interviews with Geraint Lewis, Luke Barnes, Fred Adams, Joseph Silk, and Abraham "Avi" Loeb.

  • S19E03 What's Fine-Tuning in Physics?

    • January 10, 2019
    • PBS

    What is fine-tuning in physics? Why do the “constants of nature” — masses of subatomic particles and strengths of forces like gravity and electromagnetism — have the values they do? Does fine-tuning “cry out” for explanation? Featuring interviews with Bernard Carr, Luke Barnes, Geraint Lewis, George F. R. Ellis, and Abraham Loeb.

  • S19E04 Is the Anthropic Principle Significant?

    • January 17, 2019
    • PBS

    Is the Anthropic Principle significant? Here’s the claim: conditions of the universe relate to the presence of observers. Does the Anthropic Principle convey deep insights? Or thwart science? For sure, it’s often misunderstood and controversial.

  • S19E05 What's Strong Emergence?

    • January 24, 2019
    • PBS

    Each level of the scientific hierarchy has its own laws that can't be explained by deeper laws.

  • S19E06 What Exists II?

    • January 31, 2019
    • PBS

    What is absolutely fundamental and non-reducible -- the fewest number of categories within which everything can be classified.

  • S19E07 Why Anything at All II?

    • February 7, 2019
    • PBS

    Why there is something rather than nothing.

  • S19E08 Epistemology: How Can We Know God?

    • February 14, 2019
    • PBS

    What it means to know God.

  • S19E09 Jesus as God: A Philosophical Inquiry

    • February 21, 2019
    • PBS

    The claim that Jesus is God.

  • S19E10 The Trinity: A Philosophical Inquiry

    • February 28, 2019
    • PBS

    How one God can be three persons.

  • S19E11 The Incarnation: A Philosophical Inquiry

    • March 7, 2019
    • PBS

    Why would God become human; how could divine and human natures interact.

  • S19E12 Atonement: A Philosophical Inquiry

    • March 14, 2019
    • PBS

    Whether atonement absolves sin.

  • S19E13 Salvation: A Philosophical Inquiry

    • March 21, 2019
    • PBS

    Salvation equals eternal life with God.

Season 20

Season 21

Season 22

Season 23

Season 24