This season packaged reruns of the 1975 The Tom & Jerry/Grape Ape Show with Mumbly as a new component.
Shnooker receives a letter from a thief named Fleetfeet Fogarty. Fleetfeet plans to steal the Minerva Medallion in a museum. Shnooker tells Mumbly to arrest the thief.
Mumbly is assigned to retrieve a new top-secret police vehicle that ends up being stolen.
Mumbly and Shnooker are assigned to guard people and their valuables at a mansion, where a magician named The Great Merlini is performing. Shnooker thinks that it is an easy job, but Mumbly is suspicious of Merlini.
At Crabstone Prison - aka - The Rockpile, every precaution has been taken to make it escape proof. But Breakout Barney stows away inside a trash can the guards put out, and proceeds to head to the border.
Mumbly is tasked with ending the rampage of an 80-foot gorilla in the city.
Shnooker hires a robot detective named Lieutenant Nuts and Bolts. Mumbly and Nuts and Bolts have to stop a cat burglar known as The Phantom Cat from robbing a safe. Shnooker tells them that the first detective to arrest the cat burglar will keep their job, and the other detective will lose their job.
Mumbly and Shnooker take a trip to Canada just as a giant lumberjack is terrorizing the forest.
Graffooey the Great Graffiti Artist is covering Mumbly and Shnooker's city with graffiti! The detectives have to stop Graffooey before he causes even more damage to their city.
A prize-winning bull is taken, setting Mumbly on the trail of The Lonesome Rustler.
Shnooker’s TV interview is interrupted by a sudden deluge of litter, courtesy of The Littermugg. Chief Shnooker alerts the sanitation department, but even they are helpless to keep up with the numerous amounts of garbage left by Mr. Littermugg, so he assigns Mumbly to the case, giving him 24 hours to do so.
The Purple Baron freezes everyone in the city in order to rob them, except Mumbly remains unaffected and is hot on his case.
Fatbeard the pirate invades a cruise ship, causing havoc. Mumbly is sent to capture and remove him.
Shnooker’s ski vacation is spoiled by the sudden appearance of a creature scaring everyone away from the lodge.
Two criminals have it out for Mumbly and Shnooker and try everything to get rid of Mumbly.
Aliens arrive to invade Earth, and Shnooker tasks Mumbly with giving them a parking ticket and collecting the fine.
Mumbly investigates a disturbance at Dr. Seek’s lab where he discovers Dr. Seek’s new soda formula turns him into the insidious Mr. Hyde.