Season 4
7 episodes · Jun 25, 2026
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S4E1Moving Train Jump Test
Jun 25, 202618mTo 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!
S4E2Lasers vs. Lightning Destruction Test
Jun 25, 202628mNow 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.
S4E3Glitter Bomb 2.0 vs. Porch Pirates
Jun 25, 202616mActor Macaulay Culkin joins Mark as he unleashes upgraded bait packages full of glitter — and stinky fart spray — to lure potential thieves.
S4E4How to Escape a Police Sniffing Dog
Jun 25, 202625mMark'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?
S4E5Backyard Squirrel Olympics 3.0
Jun 25, 202622mLet the games begin! From a high jump to a spinning balance beam, Mark's set up a series of backyard battles for squirrels competing for the Walnut Cup.
S4E6I Built My Own Space Satellite
Jun 25, 202621mOne 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.
S4E7I Spent $5M So You Can Go to Space
Jun 25, 202619mGet ready for liftoff! After three years of work and spending millions of dollars, can Mark ensure his selfie-taking satellite has a successful launch?