1. Moving Train Jump Test

To answer an assortment of science puzzles, Mark takes his experiments to the next level — on top of a moving train and up high in a hot air balloon!

2. Lasers vs. Lightning Destruction Test

Now it's lasers vs. lightning in a showdown to find out which one is more destructive. With a series of tests, the CrunchLabs crew declares a champ.

3. Glitter Bomb 2.0 vs. Porch Pirates

Actor Macaulay Culkin joins Mark as he unleashes upgraded bait packages full of glitter — and stinky fart spray — to lure potential thieves.

4. How to Escape a Police Sniffing Dog

Mark's running for his life while being hunted down by an expert tracking dog. Can he engineer some distractions to throw the dog off her game?

6. I Built My Own Space Satellite

One small step in space, one giant leap for taking a selfie. Mark preps a satellite to snap pics of the Earth photobombing the selfies sent by his fans.

7. I Spent $5M So You Can Go to Space

Get ready for liftoff! After three years of work and spending millions of dollars, can Mark ensure his selfie-taking satellite has a successful launch?