[[caption-width-right:350:"He knows a lot about, he knows a lot about, he knows a lot about that!"]]

An EdutainmentShow on Creator/PBSKids starring Literature/TheCatInTheHat (voiced by Martin Short), Sally, Nick, and Fish and featuring Thing One and Thing Two. The series is based loosely on a franchise of books called ''The Cat in the Hat's Learning Library'', which was later retitled to match the name of this television series.

!!This show contains examples of:

* ChristmasSpecial: ''The Cat in the Hat Knows a Lot About Christmas!''
* DisembodiedEyebrows: Fish
* ExcitedShowTitle
* FantasyHelmetEnforcement: Part of the ritual preflight checklist before each adventure, as they settle into the Thingamajigger: "Buckle up! Flick the jiggamawhizzer!"
* LargeHam: Martin Short as the Cat. ''Good heavens'', Martin Short as the Cat.
* MobileFishbowl: Fish -- in this series apparently the Cat's companion rather than the children's pet -- travels with the group in a fish bowl that sits in a special cradle on the back of the Thingamajigger.
* PlutoIsExpendable: In "The Planet Name Game," the Cat, Nick and Sally travel into space and name the eight planets. Neither Pluto nor the controversy surrounding it are mentioned. Incidentally, this may be the first series of its type to touch the subject of naming the planets since the 2006 decision.
* RaceLift: In the books, the male child character was white, but he has been changed to black for the TV series. Additionally, the new books being released under the banner of ''The Cat in the Hat Knows a Lot About That'' depict him as black.
* RefugeInAudacity: In every episode, the Cat tells the kids to get a parent's permission before they can go on the day's adventure to meet [insert outlandish animal] in [insert whacky place name]. The parent always allows it, thinking they're just pretending.
** This also counts as WhatTheHellDad.
* RhymesOnADime: The Cat, regularly and obviously, in the Seussian tradition.
* RunningGag: See RefugeInAudacity above. Additionally, each episode features an interlude wherein Thing One and Thing Two are called on to get the travellers out of some difficulty, usually by building some wildly complicated contraption.
* TitleThemeTune: "Wherever you're going, wherever you're at, ''The Cat in the Hat Knows a Lot About'' (he knows a lot about, he knows a lot about, he knows a lot about...) ''That!''"
* ViewersLikeYou: Creator/{{PBS}} shows mandate a "thank you" at the end of the funding credits. The Cat takes this as yet one more opportunity to be supremely hammy. "And you and you and '''''you'''''! Thanks. So much. You're very kind."
* WhatHappenedToTheMouse: Originally, the main characters in ''Literature/TheCatInTheHat'' were the Cat, Sally, her brother Conrad, and their pet Fish. In this series, it's the Cat, ''his'' pet Fish, Sally, and a new African-American boy who lives next door, named Nick. What happened to Sally's brother? And when did Fish -- notoriously suspicious of the Cat in the original -- switch sides?
** It's possible that the boy's full name was "Nicholas Conrad" and he just started using one name more than the other.
** Also, maybe he's really Sally's cousin or the like, and lived with her for a time until his parents moved to their new home next door.
** The name Conrad was created for the [[Film/TheCatInTheHat Live Action movie]] he never had a canon name in the book.
* YouDidntAsk: In the Christmas special, this Ralph the reindeer's explanation when Sally and Nick ask why he didn't tell them that he's one of Santa's reindeer.