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Mark Rober's CrunchLabs

Season 4 · 7 episodes · Jun 25, 2026

  1. Mark Rober's CrunchLabs season 4 episode 1 still

    Episode 1

    Moving Train Jump Test

    Jun 25, 2026

    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. Mark Rober's CrunchLabs season 4 episode 2 still

    Episode 2

    Lasers vs. Lightning Destruction Test

    Jun 25, 2026

    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. Mark Rober's CrunchLabs season 4 episode 3 still

    Episode 3

    Glitter Bomb 2.0 vs. Porch Pirates

    Jun 25, 2026

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

  4. Mark Rober's CrunchLabs season 4 episode 4 still

    Episode 4

    How to Escape a Police Sniffing Dog

    Jun 25, 2026

    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?

  5. Mark Rober's CrunchLabs season 4 episode 5 still

    Episode 5

    Backyard Squirrel Olympics 3.0

    Jun 25, 2026

    Let 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.

  6. Mark Rober's CrunchLabs season 4 episode 6 still

    Episode 6

    I Built My Own Space Satellite

    Jun 25, 2026

    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. Mark Rober's CrunchLabs season 4 episode 7 still

    Episode 7

    I Spent $5M So You Can Go to Space

    Jun 25, 2026

    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?