While on a trip to the museum, the Cats end up getting locked inside after the museum closes. But while inside, they discover the mummy of Pharaoh Fluten-Tootin has come to life and wants to take his treasure, the Ruby of Isis.
The Cats spend their day at a zoo.
Lambsy is put in a hot air balloon and eventually joins Bristlehound in an airplane; all the while, Mildew is posing as the Crimson Baron (a parody of the Red Baron).
The Cats arrive at a haunted house, where its ghost is determined to trap them once and for all.
Bristlehound builds an amusement park just for Lambsy.
While traveling to a gig, the Cats meet a witch determined to use Kitty Jo as her replacement.
Mildew and Lambsy, and later Bristlehound, use magic tricks in their ongoing battle.
A Native American chief chases tourists away to preserve his land, even in the modern day, until the Cats show him a better life in show business.
When Lambsy and Bristlehound get a new television set, Mildew tricks Lambsy into thinking that he is a film director.
A pirate invades a cruise ship where the Cats were booked to perform. After a series of plots the Cats foil, the passengers all think it was all part of the act. As a result, the pirate gets a full-time job in place of being a real pirate.
Lambsy has joined the Lamb Scouts, a fact which Mildew uses to try to trap him.
A princess, her father, and her servant attend a concert of the Cats. The princess wishes she could do the dances, leading the servant to become obsessed with capturing Kitty Jo to fulfill the wish, in spite of the fact the people were to leave for home tomorrow. In the end, the Cats give her a book illustrating all the dances.
Mildew uses Lambsy's stage-acting lessons as an excuse to catch him.
A leprechaun has followed Kitty Jo's uncle home from the Republic of Ireland, and continues playing pranks on the Cats until they beat him at his own game. They turn down his pot of gold to let him free, and so he decides to hitch a ride with them.
Chessie the Autograph Hound stalks the Cats to get autographs and satisfy her fan club, inspiring a nightmare experienced by Groove later. When he awakens, he thinks his dream has been real, but what he thought was Chessie was only a police officer asking the Cats to play at their charity ball.
Mildew takes advantage of Lambsy's boredom to catch him, going as far as being a pony customers can ride for 10¢, but then an actual cowboy shows up and has actually paid the dime for the ride, so he rides Mildew.
