1. They 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!

2. Dust 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!

3. Pull Together

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

4. Lift 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.

5. That Ol' Time Rock Rolls!

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

6. Make 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!

7. Magnet Mayhem

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

8. Stop 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!

9. Picture Perfect Park Party

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

10. Sun Block

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

11. Roll, 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.

12. Ramp 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.

13. Yip 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!

14. Stick to It!

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

15. The 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.

16. Zee 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.

17. That'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!

18. Mecha Machine Makers!

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

19. The Need for Feed

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

20. The 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!

21. The 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.

22. Nat 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.

23. Let's Get Rolling!

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

24. A 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.

25. Moo-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.

26. Follow 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.

27. Cross That Bridge

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

28. Knock 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.

29. The 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.

30. The 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.

31. Yip 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.

32. The Snowman Scarecrow

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

33. All Mechas on Deck

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

34. Where 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!

36. Zee In a Bottle

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

37. MacBarm'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.

38. Playhouse Problem!

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

39. Can'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.

40. The 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!

41. Get in Gear

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

42. Free-Wheelin' Ferris Wheel

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

43. The 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.

44. The 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.

45. The 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?

46. Measure for Measure

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

47. Special Delivery

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

48. Super 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.

49. The 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!

50. The Pretty Big Thing

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

51. Sticky Space Race

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

52. The 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!