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• 01. Why Are Thin People Not Fat?
• 02. Cannabis: The Evil Weed?
• 03. Why Do We Dream?
• 04. Can We Make a Star on Earth?
• 05. The Secret Life of Your Bodyclock
• 06. What's the Problem with Nudity?
• 07. How to Survive a Disaster
• 08. Who Do You Want Your Child to Be?
• 09. Why Can't We Predict Earthquakes?
• 10. Alan and Marcus Go Forth and Multiply
• 11. How Violent Are You?
• 12. Mars: A Horizon Guide
• All episodes