Sylvester's carnivorous pursuit of Tweety Bird continues, winding up the cat's spirit in Hell, where he meets a satanic bulldog.
Sylvester Cat accepts a position as mouse-catcher on a ship, and his son, Junior, accompanies him. They encounter baby kangaroo Hippety Hopper being shipped from Australia and, as usual, mistake Hippety for a giant mouse.
Barney, outraged by his neighbor William Wildcat spanking his son, borrows the lad to try applying child psychology. But the boy's grasp of psychology (and explosives) is much better than Barney's.
A drunken stork delivers a baby mouse to the home of Mr. and Mrs. Sylvester Cat. Sylvester is about to eat the little rodent when it calls him Daddy. Touched, Sylvester adopts the mouse as his son - which, distressingly, attracts every hungry cat in the neighborhood to his door!
After driving the Foreign Legionnaires from their fort with his aroma, lovesick skunk Pepe falls for the camp mascot, a cat who's accidentally gotten a white stripe painted down her back.
The mice are on the loose after hours in a doctor's office, playing with the various pieces of medical apparatus. Susie Mouse is caged for research until her lover Johnnie frees her. A mouse orchestra plays a swinging wedding song. But throughout, a cat is stalking...
A circus comes to town featuring Gracie the Fighting Kangaroo and her youngster, Hippety Hopper.
Porky can't sleep because mice demolish his plates. A cat offers help and gets the mice out, but invites some friends so Porky still can't sleep.
Take-off on the "Duffy's Tavern" radio program, with tough-guy Eddie G. Robincat demanding a meal of mouse knuckles, "of which we ain't got none," waiter Filligan informs his absentee boss on the phone. To fill the plate, Filligan then tries to catch the blabbermouth mouse, Sniffles.
Tom Thumb ends up in the court of King Arthur.
"As everyone knows," the narrator begins, "goldfish must have water... and cats hate water." And so it goes.
An old woman has a cat, a dog, and a canary. The cat and dog fight even worse than normally. Fed up, she tells them both off, then threatens to throw them both out if there's any more trouble.
Sylvester Cat scoffs at his son's idea that a pipe like that of The Pied Piper of Hamelin could lure mice into their home to catch. But when Junior tries it and Hippety Hopper, the baby kangaroo, comes along, Sylvester believes in the power of the pipe and that Hippety is a giant mouse.
Red Riding Hood is on her way from the city to the country, to visit Granny. She's bringing Tweety Bird to Granny as a gift - which attracts Sylvester's attention. Along the way she also meets the Big Bad Wolf. Sylvester wants to eat Tweety. Big Bad wants to eat Red.
Exhausted traveler Porky Pig drives into a town looking for a hotel. He is delighted to find one with a 10 cents per-night fee. Unfortunately, its manager is Daffy Duck.
Jerry's mouse hole connects two homes, with Tom living in one residence, a neighboring cat in the other. Jerry decides the best survival plan is pitting the cats against each other, without their knowledge.
Jerry keeps sleepwalking and doing things unknowingly to Tom. He becomes aware of this and tries to stay awake.
Sylvester Cat pays a visit to a closed-to-business circus and finds Tweety Bird in one of the cages. Tweety escapes and a mad chase ensues. Meanwhile, Sylvester must flee from an uncaged lion he angered earlier.
Sylvester Cat goes bird-stalking in the mountains with his son, Junior.
In the French Alps, an out-of-control street-painter's wagon sprays a stripe of white paint atop a female cat's back. Enter Pepé Le Pew.