- Discussed: What If We Became a Type II Civilization? - with Michio Kaku
- What If T-Rex Were Still Alive?
- What If You Fell Into a Pool of Hagfish?
- What If You Only Ate Raw Meat?
- What If You Got Stuck in a Time Loop?
- Discussed: What If You Got Stuck in a Time Loop? - with Danny Rubin
- What If We Covered Our Roads with Solar Panels?
- What If We Settled on Titan?
- What If the Military Deployed a Million Nano Drones?
- Discussed: What If We Had to Evacuate Earth?
- What If You Fell Into a Pool of Jellyfish?