1They Sent Us a Pie!
A giant pie is sent to Pretty Big City to stop an asteroid… but the Mechas and friends have eaten the whole thing!
2Dust in the Wind
The Singing Stone Heads are ready to perform at the Museum, but when they open their mouths, they sneeze instead of sing!
3Pull Together
Ranger Nat is stuck at the bottom of the crevice, but the problem grows when Mecha Abby also gets stuck.
4Lift Up and Lift Off!
Zee is ready to launch his rocket into space, but when the launchpad breaks, the rocket is launched into the farm instead.
5That Ol' Time Rock Rolls!
When Big Old Boulder rolls down the hill towards the museum, Berta needs the Mechas help to keep it stable.
6Make Like a Banana and Split!
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!
7Magnet Mayhem
The magnet crane at the construction site accidentally turns on, sucking up all the metal, including the Mecha Builders!
8Stop That Train
Roof is delivering eggs to Marwyn at the Train Station, that is, until the train pulls into the station and can't stop!
9Picture Perfect Park Party
Hero Celebration Day is finishing with a slideshow of everyday heroes, that is, until the projector screen rips.
10Sun Block
Pretty Big City is cooling off with an ice slide in the park, but the situation gets slippery when the slide starts melting.
11Roll, Chickens, Roll!
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.
12Ramp Up, Up, and Away!
Ranger Nat can't wait to see Pinecone's Comet, that is, until his telescope falls to the bottom of a cliff.
13Yip Yip, Book Book!
It's the Pretty Big All City Read and Izzy and Barb are ready, that is, until all the books go missing!
14Stick to It!
Pretty Big City finds itself in a sticky situation when the factory starts spewing super sticky slime everywhere!
15The Treasure of Treetop Woods
Ranger Nat's hike turns to adventure when he finds a treasure map. The only problem is that he can't read it.
16Zee Makes an Amazing Maze!
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.
17That's the Way the Windmill Blows!
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!
18Mecha Machine Makers!
Izzy and Timmy are making a bird caller for Grandma, but have trouble connecting pieces of their machine.
19The Need for Feed
MacBarm is bringing food to his hungry chickens, that is, until all of the food falls out of his truck.
20The Zipline Sisters of Treetop Woods
Grandma and her twin sister want to recreate their old zipline act, but quickly discover that the zipline no longer exists!
21The Whatsacallit of Treetop Woods
Berta is opening an exhibit on the Whatsacallit of Treetop Woods. If only she could get a picture to prove it's real.
22Nat in the Dark!
Gerry and Nat are leading the Treetop Troops on a hike, but Nat finds himself lost in the woods as it gets darker.
23Let's Get Rolling!
It's MacBarm's croquet tournament and Zee made giant decorations but they're too big to get to the farm.
24A Bit of a Stretch!
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.
25Moo-ving Day!
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.
26Follow That Breeze
After Ranger Nat's kite blows away in the wind, the Mechas and Timmy learn to build their own kite to find it.
27Cross That Bridge
The train needs to cross the ravine, which becomes difficult when the Martians accidentally break the bridge.
28Knock Knock! Who's There?
The Zee Mobile is great at counting the chickens at the farm, but won't stop crashing into and ruining MacBarm's barn door.
29The Pinecone Palooza
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.
30The Big Footed Cave Bird
Ranger Nat is hiking and comes across the Big-Footed Cave Bird, and realizes it can't get back into her home.
31Yip Yip Tree Tree
When the ornaments on the Pretty Big City tree break, the Mechas must build new ones and save the holidays for their friends.
32The Snowman Scarecrow
It's time for Zee and MacBarm's gift exchange, but the snowman scarecrow Zee made for MacBarm keeps blowing away!
33All Mechas on Deck
Lloyd's testing a wind-up powered go-cart, but a problem arises when it keeps running out of energy.
34Where There's a Wheel, There's a Way
Sif's coming in for a landing at the rocket launch site - until her rocket is pushed off course by a satellite!
35Silly Hat Catastrophe!
Lloyd is selling silly hats at the factory, but when the hat machine malfunctions it starts raining silly hats on Pretty Big City!
36Zee In a Bottle
Zee makes a giant rocket ship in a bottle, but things take a turn when he gets stuck inside!
37MacBarm's Day Off
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.
38Playhouse Problem!
Ranger Nat is bringing a playhouse on the train for Timmy and Izzy, but it won't fit through the tunnel!
39Can't Stop the Martians!
The Martians come to Pretty Big City but find themselves in need of help when they are unable to land their spaceship.
40The Best Nest Test
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!
41Get in Gear
Panic erupts in Pretty Big City when the big clock breaks and no one is able to tell what time it is.
42Free-Wheelin' Ferris Wheel
Zee is showing off his inventions at his rocket-powered show, including his latest creation, a rocket powered Ferris wheel.
43The Legend of Jack O'Lantern
It's Halloween and everything is set for the Zee Mobile to pull the haunted hayride… until it drives away.
44The Mecha T-Rex
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.
45The Escaping Cows of Sunny Field Farm
Zee's new drone accidentally doubles as a cow caller, and the cows keep leaving the farm to go see it. But how?
46Measure for Measure
Marwyn attempts to make Pretty Big City's largest cookie, but to do so, he'll need a lot of help.
47Special Delivery
The Martians want to help Lloyd deliver packages, but keep breaking them when they drop them from up high.
48Super Duper Sled Slide
MacBarm and Zee built a slide that sends people all the way across the farm… which means people spend more time walking than sliding.
49The Case of the Missing Crystal Pinecone
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!
50The Pretty Big Thing
The mysterious "Pretty Big Thing" is scaring the people of Pretty Big City from going to work… but what is it?
51Sticky Space Race
Zee's super sticky slime spills on Zee and MacBarm, leaving them stuck together.
52The Big Ice
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!