Knock Knock! Who's There? 1 Season 28 Episode

Episode #1

They Sent Us a Pie!

Episode #2

Dust in the Wind

Episode #3

Pull Together

Episode #4

Lift Up and Lift Off!

Episode #5

That Ol' Time Rock Rolls!

Episode #6

Make Like a Banana and Split!

Episode #7

Magnet Mayhem

Episode #8

Stop That Train

Episode #9

Picture Perfect Park Party

Episode #10

Sun Block

Episode #11

Roll, Chickens, Roll!

Episode #12

Ramp Up, Up, and Away!

Episode #13

Yip Yip, Book Book!

Episode #14

Stick to It!

Episode #15

The Treasure of Treetop Woods

Episode #16

Zee Makes an Amazing Maze!

Episode #17

That's the Way the Windmill Blows!

Episode #18

Mecha Machine Makers!

Episode #19

The Need for Feed

Episode #20

The Zipline Sisters of Treetop Woods

Episode #21

The Whatsacallit of Treetop Woods

Episode #22

Nat in the Dark!

Episode #23

Let's Get Rolling!

Episode #24

A Bit of a Stretch!

Episode #25

Moo-ving Day!

Episode #26

Follow That Breeze

Episode #27

Cross That Bridge

Episode #28

Knock Knock! Who's There?

Episode #29

The Pinecone Palooza

Episode #30

The Big Footed Cave Bird

Episode #31

Yip Yip Tree Tree

Episode #32

The Snowman Scarecrow

Episode #33

All Mechas on Deck

Episode #34

Where There's a Wheel, There's a Way

Episode #35

Silly Hat Catastrophe!

Episode #36

Zee In a Bottle

Episode #37

MacBarm's Day Off

Episode #38

Playhouse Problems

Episode #39

Can't Stop the Martians

Episode #40

Best Nest Test

Episode #41

Get in Gear

Episode #42

Free-Wheelin' Ferris Wheel

Episode #43

The Legend of Jack O'Lantern

Episode #44

The Mecha T-Rex

Episode #45

The Escaping Cows of Sunny Field Farm

Episode #46

Measure for Measure

Episode #47

Special Delivery

Episode #48

Super Duper Sled Slide

Episode #49

The Case of the Missing Crystal Pinecone

Episode #50

The Pretty Big Thing

Episode #51

Sticky Space Race

Episode #52

The Big Ice