A Formiga Atômica é um desenho animado de um super-herói criado por Hanna-Barbera em 1965. Seu nome (original em inglês, Atom Ant) pode ser derivado de adamantino (adamant, em inglês), numa indicação de sua grande força (excedendo "50 vezes seu próprio peso"). A Formiga Atômica tem sua base num formigueiro próximo da cidade, onde ela tem um computador do tipo mainframe e equipamentos de exercício. Seus poderes consistem na habilidade de voar, super-velocidade e força descomunal.
Granny and Pupp are building a fast car to race with. They need the prize money. Two crooks want to win the money, too, and they're willing to do anything crooked to win.
The Bear family decides to take a walk to let their breakfast cool. Meanwhile, a passing movie star named Goldy Looks gets a flat tire and finds the Bear's house while looking for help. She ends up eating their food and sleeping in their beds and she runs off when the Bears get home with an idea for a movie.
Granny gets a letter in the mail with a big box. Her aunt has left her everything in a will, including a big bulldog. Granny must humor the bulldog and have perfect harmony, or else she will lose everything in the will. The bulldog takes an immediate dislike for Precious Pupp.
Sumo the Japanese fighting bear is on his way to the circus when he falls out of the truck when it hits a bump. Sumo helps Paw Rugg learn karate so he can use it on his rival, Claude Hopper.
Experimental plane X-Ray-X lands near the Rugg house and Paw goes for an unexpected ride with agent 00700 and his pal who are trying to steal the plane.
A crook disguises himself as a little old lady when he hears that Granny Sweet won sweepstakes that are worth $500,000 dollars, but he can't fool Precious.
Granny Sweet goes shopping and gives Precious Pupp a big bone to keep him happy and busy while she is gone. Brutus the Bulldog decides he wants the bone and the battle is on.
Grandpa Rugg comes for a visit much to the excitement of Shag and Floral. Grandpa wants to shoot some Hoppers not knowing that Paw has just ended the feud with them.
Precious and Granny Sweet head out to the country to look for butterflies for her collection. Precious digs up a tin box full of money left by a pair of crooks who had buried it. They come back to find Precious guarding it.
Granny Sweet agrees to watch a pet bird for her friend Mrs. Brown while she is out of town. While Granny takes Mrs. Brown to the train, Precious Pupp is put in charge of the bird and has to protect it from an overzealous and very hungry cat.
Precious and Granny Sweet are in London where Granny Sweet snaps pictures of the sights to send the pictures to family members while Precious gets lost chasing a cat and meets a pickpocket and his group of dog pickpockets.
When an experienced hunter comes to the hills offering a reward for a speckled butterfly, the Hillbilly Bears try to capture the local pest for the reward.
Precious Pupp and Granny Sweet are on vacation. Granny is heating up a big pot of food for their dinner. A cannibal in the bushes has other ideas: he plans on them for his dinner. When he finally does capture them and Granny offers to share what she is cooking, he runs for his life.
Paw's turnip patch is being raided by a troublesome goat. When Paw fails to get rid of the goat, Maw mixes up some cooked turnips with hot sauce in them.
Paw's cousin Fud sends a telegram saying he is going to stop in for a visit since they have never met. Meanwhile, Gorzo the Wild Man escapes from a truck delivering him to the circus and is mistaken for cousin Fud when he shows up at the cabin.
Both Precious and Bruiser vie for the attention for the same female poodle dog by posing as superheroes because she appears to have a crush on Marvel Mutt, a canine superhero on T.V.