| 1: Earth Is a Hot Mess |
| Apr 21, 2017 |
| Bill calls out climate change deniers, breaks down the science of global warming and explains how we can make the planet a cooler place to live. |
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| 1: Earth Is a Hot Mess |
| Apr 21, 2017 |
| Bill calls out climate change deniers, breaks down the science of global warming and explains how we can make the planet a cooler place to live. |
| 2: Tune Your Quack-o-Meter |
| Apr 21, 2017 |
| Bill and his panel of experts debunk bogus alternative remedies like homeopathy, the healing power of magnets ... and curing cancer by yelling at it. |
| 3: Machines Take Over the World |
| Apr 21, 2017 |
| From robots that paint Rembrandts to Twitterbots gone rogue, Bill and his guests explore the potential and pitfalls of artificial intelligence. |
| 4: More Food, Less Hype |
| Apr 21, 2017 |
| Bill extracts DNA from a strawberry in the lab and talks about genetically modified foods with a Monsanto executive, a professor and a farmer. |
| 5: The Original Martian Invasion |
| Apr 21, 2017 |
| Bill introduces the theory of panspermia, NASA scientists discuss the Mars 2020 mission, and Wil Wheaton and the panel ponder life on other planets. |
| 6: Do Some Shots, Save the World |
| Apr 21, 2017 |
| With help from some friends in raincoats and a room full of unemployed germs, Bill demonstrates how vaccines work and why everyone needs to get them. |
| 7: Cheat Codes for Reality |
| Apr 21, 2017 |
| Bill and his correspondents check out video game technology that's changing the world, including a game that helps surgeons sharpen their skills. |
| 8: This Diet Is Bananas |
| Apr 21, 2017 |
| What's in a calorie? Bill flambés a marshmallow in the name of science, experts weigh in on fad diets, and singing kale keeps it real about nutrition. |
| 9: The Sexual Spectrum |
| Apr 21, 2017 |
| Sex is complex! Bill explores the ever-evolving science of sexuality with help from a panel of experts and "Crazy Ex-Girlfriend" star Rachel Bloom. |
| 10: Saving the World -- with Space! |
| Apr 21, 2017 |
| Bill and the panel discuss private space travel. Mean astronaut Joel McHale answers questions, and lunar gravity gives a young basketballer a boost. |
| 11: Malarkey! |
| Apr 21, 2017 |
| Chemtrails. Crop circles. Palm readers. Bill takes aim at pseudoscience and explains how confirmation bias makes us believe things that aren't true. |
| 12: Designer Babies |
| Apr 21, 2017 |
| Bill explores advances in IVF that are helping couples have healthy babies. "Project Runway" star Tim Gunn hosts a special fashion show in the lab. |
| 13: Earth's People Problem |
| Apr 21, 2017 |
| Bill and his guests talk about tackling overpopulation by empowering women. Comedian Joanna Hausmann interviews couples about male contraception. |