Tom designs a better mousetrap that would have made Rube Goldberg jealous. While he sleeps, the mouse that Tom drew wakes Jerry and they get chased by the cat Tom drew. As Tom awakes, they make a strategic alteration to the design.
Jerry and his diapered little mouse friend flood the kitchen, then use the freezer to turn it into a skating rink. Even though Tom finds a pair of ice skates, the mice have no problem outmaneuvering him.
Barney has a dive mask and swim fins to help with his pursuit of fish. First, though, he needs to get the anchor set, despite an overly helpful little seal. The seal acts like an inept hunting dog, leading Barney to a cave with an angry lobster, then an unfortunate encounter with a shark.
Tom's day at the beach doesn't start out well. First he gets his swimsuit caught in the door of the beach house, and doesn't realize it until his intended dive in the ocean sends him snapping back and crashing through the door. He runs out and tries again. This time he is so determined to jump in...
Spike is guarding a private fishing hole - in his sleep. Tom sneaks in to do some fishing - with Jerry as bait. But one particularly vicious fish turns out to be more than Tom or Jerry bargained for, particularly when he wakes up Spike.
Three witches need a worm to complete their potion; they dispatch a raven to catch one, and he goes after a bookworm. He chases the worm into the horror section, where the monsters attack but soon, Paul Revere rides Black Beauty to the rescue, along with the Police Gazette, and other assorted war...
Jerry's eccentric uncle, Pecos, a Texan mouse, comes to spend the night with him before his musical performance on television the next day. He decides to rehearse with his guitar for the performance but each time he plays, one of his guitar strings snaps off. Fortunately, he is able to replace them...
Yet another variation on the Three Little Pigs theme, this time told as WW2 anti-German propaganda (the US had just entered the war), with the wolf as a thinly-disguised Hitler.
Poe's raven, not feeling well, goes in search of a doctor, and in a nearby book finds Dr. Jekyll. The doctor offers to transfer the bookworm's brain to the raven.
As a narrator describes the scene, we watch the whole Katzenjammer clan camping in the park of the title, a composite of several national parks in the western USA. There are several spot gags, including Mama taking a picture of a bear and ending up being photographed by several bears. Mama has a...
Tom is a cowboy boot-wearing cat at a Texas dude ranch. When a beautiful female cat comes for a visit, Tom takes time from his regular torturing of Jerry to use the mouse as a way to impress the dame. Naturally, Jerry gives Tom his comeuppance.
