2. Episode 2

Greg explores an urban myth about surviving a falling elevator, risks some friendships to find out what makes chilies hot, and finds out what happens to our bodies when we die.

3. Episode 3

Greg looks into whether underdogs can really win fights like they do in the movies, why the sky is blue and if your eyeballs will pop out if you sneeze with your eyes open.

4. Episode 4

Mysteries solved include what it takes to become the fastest man on Earth, why a boomerang comes back, and how bulletproof vests work.

5. Episode 5

Greg tests an urban myth about pennies and the Empire State Building, subjects himself to extreme cold temperatures and takes a hammer to his fingers, all in the name of science.

6. Episode 6

Greg tries to dig a hole to Australia, gets sucked into quicksand and discovers how fast you can get fat eating fast food. With a pig's help, he also finds out if it is physically possible to die of a broken heart.