S5 E1 • How Do Human Brains Think and Feel?

S5 E2 • Does a Fine-Tuned Universe Lead to God?

S5 E3 • Wondering About God

S5 E4 • What's the Far Far Future of the Universe?

S5 E5 • Solutions to the Mind-Body Problem?

S5 E6 • How is God the Creator?

S5 E7 • What Would Multiple Universes Mean?

S5 E8 • What Things are Conscious?

S5 E9 • Can Religion be Explained Without God?

Most people believe that God exists and religion is God's revelation. But some claim that religion needs nothing supernatural; that religion, without God, can flourish because personal psychology and group sociology drive religion.

S5 E10 • What's Real About Time?

Time seems natural and absolute: the flow of moments one following another from the unknown past to the knife's edge present to the unknowable future. But this is not so. Einstein shocked the world by showing that time was "relative." What's the latest about time?

S5 E11 • How do Persons Maintain Their Identity?

What does it mean to be a "self"? Look at an old photo. Then look in the mirror. Those two images are of the same person, right? How so? They don't look the same. Their memories are different. And virtually every atom is different. We feel unity across time, but is this solidified self an illusion?

S5 E12 • Is God a Person?

If God exists, one most important question is whether God is a "person". Only a person has awareness, beliefs, intents, goals, relationships. An impersonal force has none of these. If my hope counts, God exists and God is a person. But that's absurd: my hope counts for nothing.

S5 E13 • Asking Ultimate Questions

I like pushing boundaries, trying to discern existence, searching the foundations of reality, knowing all that can be known. Overly ambitious? Sophomoric? I don't care. I do it anyway. Here are ultimate questions.