When Marwyn runs out of ice, the Martians send a giant hunk of ice. All goes well until the ice starts sliding towards the skyscraper!

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Zee's super sticky slime spills on Zee and MacBarm, leaving them stuck together.

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The mysterious "Pretty Big Thing" is scaring the people of Pretty Big City from going to work… but what is it?

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Izzy and Timmy go to dig up treasure at the top of Lawrence Pinecone's Statue's shadow… only to find that nothing's there!

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MacBarm and Zee built a slide that sends people all the way across the farm… which means people spend more time walking than sliding.

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The Martians want to help Lloyd deliver packages, but keep breaking them when they drop them from up high.

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Marwyn attempts to make Pretty Big City's largest cookie, but to do so, he'll need a lot of help.

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Zee's new drone accidentally doubles as a cow caller, and the cows keep leaving the farm to go see it. But how?

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Timmy can't wait to trick or treat as a Mecha T-Rex, but his Halloween is almost ruined when he can't reach the arms to his costume.

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It's Halloween and everything is set for the Zee Mobile to pull the haunted hayride… until it drives away.

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Zee is showing off his inventions at his rocket-powered show, including his latest creation, a rocket powered Ferris wheel.

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Panic erupts in Pretty Big City when the big clock breaks and no one is able to tell what time it is.

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Zee needs to communicate with Sif in outer space but can't because a bird has made its home on top of the satellite dish!

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The Martians come to Pretty Big City but find themselves in need of help when they are unable to land their spaceship.

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Ranger Nat is bringing a playhouse on the train for Timmy and Izzy, but it won't fit through the tunnel!

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It's MacBarm's day off and Zee takes over harvesting carrots with his Zee mobile, but when it breaks, the work still needs to be done.

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Zee makes a giant rocket ship in a bottle, but things take a turn when he gets stuck inside!

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Lloyd is selling silly hats at the factory, but when the hat machine malfunctions it starts raining silly hats on Pretty Big City!

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Sif's coming in for a landing at the rocket launch site - until her rocket is pushed off course by a satellite!

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Lloyd's testing a wind-up powered go-cart, but a problem arises when it keeps running out of energy.

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It's time for Zee and MacBarm's gift exchange, but the snowman scarecrow Zee made for MacBarm keeps blowing away!

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When the ornaments on the Pretty Big City tree break, the Mechas must build new ones and save the holidays for their friends.

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Ranger Nat is hiking and comes across the Big-Footed Cave Bird, and realizes it can't get back into her home.

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Grandma and Timmy are entering the Pinecone Art Show by carving a sculpture out of stone… that is, if they can learn how to carve.

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The Zee Mobile is great at counting the chickens at the farm, but won't stop crashing into and ruining MacBarm's barn door.

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The train needs to cross the ravine, which becomes difficult when the Martians accidentally break the bridge.

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After Ranger Nat's kite blows away in the wind, the Mechas and Timmy learn to build their own kite to find it.

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Zee's growth ray turns Moobert giant, but when a storm rolls in, the Mechas need to build a shelter big enough to fit her.

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It's the opening day of the skyscraper and the Mechas need to put the sphere on top of the building before the ribbon cutting ceremony.

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It's MacBarm's croquet tournament and Zee made giant decorations but they're too big to get to the farm.

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Gerry and Nat are leading the Treetop Troops on a hike, but Nat finds himself lost in the woods as it gets darker.

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Berta is opening an exhibit on the Whatsacallit of Treetop Woods. If only she could get a picture to prove it's real.

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Grandma and her twin sister want to recreate their old zipline act, but quickly discover that the zipline no longer exists!

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MacBarm is bringing food to his hungry chickens, that is, until all of the food falls out of his truck.

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Izzy and Timmy are making a bird caller for Grandma, but have trouble connecting pieces of their machine.

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The windmill isn't turning, which means Sunny Field Farm has no power. The windmill needs to turn again so Zee can launch his rocket!

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Zee and MacBarm are setting up their corn maze with the help of Zee's Zee Mobile... that is, until it breaks down inside the maze.

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Ranger Nat's hike turns to adventure when he finds a treasure map. The only problem is that he can't read it.

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Pretty Big City finds itself in a sticky situation when the factory starts spewing super sticky slime everywhere!

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It's the Pretty Big All City Read and Izzy and Barb are ready, that is, until all the books go missing!

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Ranger Nat can't wait to see Pinecone's Comet, that is, until his telescope falls to the bottom of a cliff.

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Farmer MacBarm is hosting the Sunny Field Farm Chicken Roll, but the race gets off to a slow start when the chickens don't roll.

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Pretty Big City is cooling off with an ice slide in the park, but the situation gets slippery when the slide starts melting.

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Hero Celebration Day is finishing with a slideshow of everyday heroes, that is, until the projector screen rips.

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Roof is delivering eggs to Marwyn at the Train Station, that is, until the train pulls into the station and can't stop!

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The magnet crane at the construction site accidentally turns on, sucking up all the metal, including the Mecha Builders!

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It's Food Day in Pretty Big City, but the Mechas need to help when the banana atop the banana split statue is not split!

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When Big Old Boulder rolls down the hill towards the museum, Berta needs the Mechas help to keep it stable.

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Zee is ready to launch his rocket into space, but when the launchpad breaks, the rocket is launched into the farm instead.

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Ranger Nat is stuck at the bottom of the crevice, but the problem grows when Mecha Abby also gets stuck.

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The Singing Stone Heads are ready to perform at the Museum, but when they open their mouths, they sneeze instead of sing!

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A giant pie is sent to Pretty Big City to stop an asteroid… but the Mechas and friends have eaten the whole thing!

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