About this season
Robot heroes in training Elmo, Cookie Monster, and Abby Cadabby use their STEM superpowers to solve wacky larger-than-life problems.
Episodes (52)
1. They Sent Us a Pie!
Aired 30 April 2022 • 12 min
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
Aired 30 April 2022 • 12 min
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
10.0Aired 9 May 2022 • 12 min
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!
Aired 9 May 2022 • 12 min
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!
Aired 9 May 2022 • 12 min
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!
Aired 9 May 2022 • 12 min
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
Aired 9 May 2022 • 12 min
The magnet crane at the construction site accidentally turns on, sucking up all the metal, including the Mecha Builders!
8. Stop That Train
Aired 9 May 2022 • 12 min
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
Aired 9 May 2022 • 12 min
Hero Celebration Day is finishing with a slideshow of everyday heroes, that is, until the projector screen rips.
10. Sun Block
Aired 9 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
Pretty Big City finds itself in a sticky situation when the factory starts spewing super sticky slime everywhere!
15. The Treasure of Treetop Woods
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
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!
Aired 16 May 2022 • 12 min
Izzy and Timmy are making a bird caller for Grandma, but have trouble connecting pieces of their machine.
19. The Need for Feed
Aired 16 May 2022 • 12 min
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
Aired 16 May 2022 • 12 min
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
Aired 29 August 2022
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!
Aired 29 August 2022
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!
Aired 30 August 2022
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!
Aired 30 August 2022
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!
Aired 31 August 2022
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
Aired 31 August 2022
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
Aired 1 September 2022
The train needs to cross the ravine, which becomes difficult when the Martians accidentally break the bridge.
28. Knock Knock! Who's There?
Aired 1 September 2022
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
Aired 2 September 2022
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
Aired 2 September 2022
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
Aired 5 December 2022
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
Aired 5 December 2022
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
Aired 16 January 2023
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
Aired 16 January 2023
Sif's coming in for a landing at the rocket launch site - until her rocket is pushed off course by a satellite!
35. Silly Hat Catastrophe!
Aired 17 January 2023
Lloyd is selling silly hats at the factory, but when the hat machine malfunctions it starts raining silly hats on Pretty Big City!
36. Zee In a Bottle
Aired 17 January 2023
Zee makes a giant rocket ship in a bottle, but things take a turn when he gets stuck inside!
37. MacBarm's Day Off
Aired 18 January 2023
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!
Aired 18 January 2023
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!
Aired 19 January 2023
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
Aired 19 January 2023
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
Aired 20 January 2023
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
Aired 20 January 2023
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
Aired 27 October 2023
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
Aired 27 October 2023
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
Aired 3 November 2023
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
Aired 3 November 2023
Marwyn attempts to make Pretty Big City's largest cookie, but to do so, he'll need a lot of help.
47. Special Delivery
Aired 10 November 2023
The Martians want to help Lloyd deliver packages, but keep breaking them when they drop them from up high.
48. Super Duper Sled Slide
Aired 10 November 2023
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
Aired 17 November 2023
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
Aired 17 November 2023
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
Aired 24 November 2023
Zee's super sticky slime spills on Zee and MacBarm, leaving them stuck together.
52. The Big Ice
Aired 24 November 2023
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!