Upon Stanley Livingston bring them to the Megapolis Zoo, Tennessee and Chumley end up trying their first job outside of the zoo as mechanics. Unfortunately for them, their first customer is Rocky Maninoff.
Tennessee and Chumley get jobs as weathermen where a farmer demands them to make rain for his cauliflower crops or he will use his shotgun on them. Now Tennessee and Chumley must find a way to make rain.
Due to the darkness in their quarters, Tenneseee and Chumley end up figuring how how lights work when the darkness prevents Tennessee from reading his book.
Following a message-delivering to all the animals for Stanley Livingston's piano performance, Tennesssee and Chumley try to figure out how a telephone works since Stanley claims that all animals must provide for themselves when Tennessee brings up the idea of having telephones in each animals' quarters.
When Stanley Livingston wants to obtain a giant clam for the Megapolis Zoo, Tennessee and Chumley end up sneaking out of the zoo to obtain one for him.
In a follow-up to "Coal Minors," the tunneling that Tennessee and Chumley did for their coal mine has caused the foundation of Stanley's office to settle to one side. While Stanley and Flunky go into town to find someone to build a new foundation, Tennessee tries to straighten the foundation. When nothing seems to work, Tennessee and Chumley go to Phineas J. Whoopee for help.
A new animal named Tiger Tornado appears to be a narcoleptic, but he becomes a fierce fighter at the sound of a boxing-ring bell. Jerboa Jump teams up with Tiger and the two make the other zoo animals kowtow to their wishes. Tennessee and Chumley consult Phineas J. Whoopee on how to defend themselves.
Tennessee and Chumley become private detectives. Hotel manager Mr. Hothead hires them to deal with the robberies committed by Slippery Hood, who has eluded every hotel detective. In order to get a better stake-out on Slippery Hood's hotel room, Tennessee and Chumley turn to Phineas J. Whoopee, who tells them about telescopes.
Tennessee and Chumley get jobs at Stonecutter's Jewelry Store. Mr. Stonecutter tells them that they must protect the diamonds or they will go to jail. Rocky Maninoff robs the store and hides out on a ship. While being pursued by the ship's crew, Tennessee and Chumley run into Phineas J. Whoopee, who tells them about diamonds.
When Tennessee and Chumley are ordered by Stanley Livingston to get back the rare coin with which they accidentally paid the paperboy, they trace the coin's path to a bakery and then to a cookie from that bakery that Chumley ate. How shall they recover the coin? Tennessee and Chumley turn to Phineas J. Whoopee, who tells them about x-rays.
Tennessee is putting on a play about the Pilgrims called "The Romance of Plymouth Rock." Jereboah Jump and Tiger Tornado plan to join the play as Indians so that they can sabotage it. When Jereboah claims that the Indians were not friendly to the Pilgrims, Tennessee calls in Phineas J. Whoopee for help on the history of the Pilgrims.
On Christmas Eve, Stanley Livingston orders Tennessee and Chumley to guide the arriving tree trimmers to the Christmas tree. Tennessee and Chumley trim the tree with the help of Yakkety and Baldy until the ornaments are destroyed.Tennessee and Chumley ask Phineas J. Whoopee for help on making ornaments.