By the table where Peg and Cat play knights, they appear in their knight gear. As per usual, they introduce themselves and run in circles around the table. Then, they hear three voices calling for help: a high voice, a deep voice, and a wavery voice. Peg wonders if it's a three-headed beast.
They set off, but after a while, they start to only hear one voice, which makes Peg revise her hypothesis and speculate that it's actually three creatures. Just then, it is revealed to be the Mermaid, the Toad, and the Dragon, who appear. The Mermaid reveals that her emerald pyramids have been stolen.
Peg asks who the thief could be, and the Mermaid tells her that she saw a yellow pyramid flying sideways. The Dragon reveals that he has two purple spheres that were also stolen, and that he saw a floating yellow ball. The Toad was also robbed, this time of his blue cubes, and he saw a flying yellow cube.
Peg and Cat have no idea who the thief/thieves is or are, scaring the creatures, but Peg has a notion: seeing as they were all yellow, maybe it's the same creature. The Toad wonders how one creature could be part-pyramid, part-sphere, and part-cube, and Peg answers the question by drawing a sphere with a pyramidal appendage and a cube-shaped appendage.
Then, the culprit reveals itself: a giant blob of yellow stuff, containing the stolen shapes plus the 100 Chickens. Peg thinks that her work is done and sings Problem Solved while the beast runs away. However, the creatures say that Peg needs to get the things back.
The beast goes into the forest, and Cat worries that it will steal the table. Peg tries to reassure him that so far the beast has only stolen solid shapes, but then they find the table gone anyway. Ramone shows up in his wizard garb and reveals, in song, that the larcenous beast is called the Blabberwocky, or Blabberwock for short.
He takes them to the castle, where they find that the Pig's triangles have been stolen. Cat makes a joke about the king being "out of shape", when he gets his foot caught on a golden chain... which is then revealed to be attached to the Blabberwocky. Peg grabs hold of Cat and both get pulled out the window. Outside, they follow the chain but don't see the Blabberwocky.
It then shows up, next to a giant sculpture of a chicken, and starts doing the Chicken Dance. It then goes for a swim, so Peg and Cat search for the stolen shapes but can only find paint and brushes. The people who had been robbed show up to complain, prompting Peg to freak out, and Cat to remind her to count backwards. Cat knocks one of the pyramids off the sculpture and Peg realises that it's one of the mermaid's emerald pyramids painted over.
As Peg explains that the sculpture is made of stolen property, Ramone uses magic to clean off the paint. They sing Problem Solved, then the 100 Chickens show up again but this time not attached to the Blabberwocky and they claim not to know about it.
Peg starts singing about how she will always help when trouble arises and about how useful drawing is. The others join in.
This episode provides examples of
- Accessory-Wearing Cartoon Animal: Cat wears a knight's helmet.
- Borrowed Catchphrase: The mermaid, toad, and dragon say, "Then we've got a big problem!" instead of Peg. Then, the second time, it's Cat who says it.
- Comically Missing the Point: Cat tries to say that the chain is attached to the Blabberwocky but can't because he's being pulled away. Peg says, "Not the blaeehh!".
- Embarrassing Pyjamas: Ramone recounts that the Blabberwocky once stole his door at night, leading to him being embarrassed because his friends, aunts, and both his grandmothers saw him in his pyjamas.
- Floating in a Bubble: Justified for Ramone, Peg, and Cat, who fly in magical golden bubbles instead of real soap bubbles.
- Idiot Ball: Peg doesn't realise that she has to get the items back; she thinks that finding who the thief is is enough.
- Left the Background Music On: The "big problem" theme is played on horns the second time round.
- List Song: Downplayed for the song about the Blabberwocky, which is partly, but not completely, a list of things it steals.
- Literal-Minded: When Peg tells Cat to say something, he replies, "Something!".
- Melancholy Musical Number: When the Pig gets robbed of his triangles, he sings a sad song about missing them.
- Noodle Incident: It's never revealed how the 100 Chickens ended up attached to the Blabberwocky, or why they claimed not to see it.
- Nursery Rhyme: During the song about how the Blabberwocky steals things, Ramone sings that it might take the "hickory-dickory from your docky". Peg and Cat don't know what that means.
- Pun: Cat quips that without any triangles, the Pig seems "out of shape".
- Shout-Out: The beast's name comes from the Jabberwock(y), which featured in a poem in Through the Looking Glass.
- Speak in Unison:
- The mermaid, toad, and dragon declare the situation a "big problem" in unison.
- When Peg asks the mermaid, toad, and dragon if they want their shapes back, they say, "Yes" in unison.
- When the table disappears, Peg says, "Without the round table, we're..." and then she and Cat say in unison, "The Knights of No Table?!".
- Sticky Fingers: The Blabberwocky's main shtick is that it steals anything whose shape has a defined name (e.g. square, triangle).
- "The Villain Sucks" Song: At one point, Ramone, Peg, and Cat sing a song about how bad the Blabberwocky is for stealing.
