S02E06: How to Travel Through Time
Bill breaks down the science of time travel with guests Zach Braff, retired astronaut Scott Kelly and the minds behind "Star Trek" and "Lost."
Previous Episode 
Season 1
Earth Is a Hot Mess
S1E1 / 21 Apr 2017
Tune Your Quack-o-Meter
S1E2 / 21 Apr 2017
Machines Take Over the World
S1E3 / 21 Apr 2017
More Food, Less Hype
S1E4 / 21 Apr 2017
The Original Martian Invasion
S1E5 / 21 Apr 2017
Do Some Shots, Save the World
S1E6 / 21 Apr 2017
Cheat Codes for Reality
S1E7 / 21 Apr 2017
This Diet Is Bananas
S1E8 / 21 Apr 2017
The Sexual Spectrum
S1E9 / 21 Apr 2017
Saving the World -- with Space!
S1E10 / 21 Apr 2017
Malarkey!
S1E11 / 21 Apr 2017
Designer Babies
S1E12 / 21 Apr 2017
Earth's People Problem
S1E13 / 21 Apr 2017
Season 2
The Marijuana Episode
S2E1 / 29 Dec 2017
Your Computer Is Under Attack
S2E2 / 29 Dec 2017
We Suck at Sleeping
S2E3 / 29 Dec 2017
Sex, Drugs and Superbugs
S2E4 / 29 Dec 2017
Extinction: Why All Our Friends Are Dying
S2E5 / 29 Dec 2017
How to Travel Through Time
S2E6 / 29 Dec 2017
Season 3
Cheating Death
S3E1 / 11 May 2018
Surviving in a World Without Water
S3E2 / 11 May 2018
The Addiction Episode
S3E3 / 11 May 2018
Recipes from the Future
S3E4 / 11 May 2018
Evolution: The Fact of Life
S3E5 / 11 May 2018
What Is Your Pet Really Thinking?
S3E6 / 11 May 2018
