Trama

Jimmy turns his babysitting Grandma into a toddler to avoid her elderly rants and rambles/ Jimmy goes back in time to convince his dad to invest in a successful fast food chain, making the family rich in the present.

Granny Baby: Jimmy's paternal grandmother and Hugh's mother babysits her grandson, Jimmy. Judy doesn't want Jimmy to do any experiments on his grandmother while she and Hugh are going on their third honeymoon. But Jimmy gets bored hearing his grandmother's stories and he places a substance in his grandmother's medicine, but she is turned into a baby. Jimmy enlists Cindy to help him create an antidote for his grandmother before his parents get home. Time Is Money: Jimmy wants an expensive encyclopedia set, he goes back in time to convince his young father to invest in McSpanky's. Jimmy's wish on being wealthy comes true, but his parents have become cold and distant towards him. Even though Jimmy has the encyclopedia set, he realizes that have money and status aren't what they seem. Jimmy fixes his mistake and he decides not to get the encyclopedias.—dawsonpersi

Granny Baby The episode begins with Jimmy's parents going on a honeymoon and they tell him that Granny Neutron is coming to look after him, or rather he is going to look after her. His parents also make him promise to not conduct any experiments on her as he had done in the past. After a while, Granny begins to tell gross stories about the effects of on her health. Jimmy then gets an idea to create a youth potion so Granny can experience youth again.

The next morning, Granny goes on another elderly rant as Jimmy sneaks the green liquid into her medicine bottle. However after she drinks it it turns her all the way back into a baby, who can surprisingly still talk. Jimmy begins panicking then confused asks Granny where she got her diaper from. She replies she was already wearing it. Suddenly Granny poops herself and replies that she needs to be changed as green fumes begin to rise up from her diaper. Flustered, Jimmy asks Goddard to change her diaper but he refuses. This makes Granny start crying loudly. Desperate for a solution, Jimmy asks Goddard "Who can change a diaper?". First, Goddard suggests a nurse but Jimmy does not know any nurses. Second, Goddard suggests his mother but Jimmy does not want to interrupt her honeymoon and also let her know he disobeyed her. Lastly, Goddard suggests Cindy. Jimmy at first flat out refuses but soon changes his mind after Granny poops some more and begs him to "clean my poopy". Jimmy then builds up the courage to go across the street.

Luckily, Cindy is in the middle of a garage sale with Libby. At first, the girls fawn over the adorable Granny baby until they both get a whiff of her stinky diaper. They are taken more aback when the baby begins speaking and cracking jokes, mentioning that she has a rash. Jimmy explains the situation to the girls, before being interrupted by Granny, saying that the smell from her dirty diaper is making her dizzy. She instantly reverts to her infant state when she spies a "dolly" on the table, which Cindy gives to her. Cindy then asks how long will she be a baby, to which Jimmy says he is unsure, but has to change her back to normal before his parents get home. Cindy asks how many diapers they will need, just as Granny poops three more times and jokes they will need "about 100". Cindy finally complies and she and Jimmy head off to the store together to buy the necessary supplies, while Libby runs the yard sale.

While at the store, Granny keeps talking loudly. Some nearby people begin to observe the baby speaking and they are shocked and enthralled. The people then begin to chase after Cindy, Jimmy, and the grandmother, but only after they've gathered the diapers, as well supplies needed for the antidote. Meanwhile, Jimmy's parents are heading home early, as Hugh had been attacked by a mother eagle who thought Hugh was after her eaglets. Jimmy begins to quickly make the antidote, but the people are still intent on hearing the baby speak. Jimmy then sets Cindy on the job of completing the antidote. He then convinces the people that the baby was actually a doll and the crowd quickly disperses. A few seconds later Cindy comes outside with the antidote placed inside a baby bottle. Granny Neutron drinks from it and is returned to her normal age just in time and Jimmy's parents pull up into the driveway. Cindy leaves to go back over to help Libby with the yard sale (now attended by the crowd from earlier) as Carl and Sheen arrive. Feeling thirsty, Carl accidentally drinks from the baby bottle containing the antidote and becomes an elderly man. He then gets the urge to dance badly and dances with Granny Neutron as the episode ends.

Time Is Money The episode starts with Jimmy, Carl, and Sheen watching a show on TV about the brain and how it works. No one likes the show because it's boring, so Jimmy is about to change the channel, but then they see a commercial for a product called "The 1000 Volume Set of the Encyclopedia of Infinite Knowledge," which is an 1000-volume set encyclopedia that has all the information in the universe. The commercial also says that if the viewer buys the set, they get a new volume every week for 19.23 years. Jimmy decides to get the set, he tells his mom about it, and she calls, but it costs too much ($500.00).

Jimmy talks to his dad about how much he wants it and how he desires to be rich. Hugh tells Jimmy about an investment that he almost made with the owner of McSpanky's (which wasn't that famous at the time), which he ended turned down at last minute, but would have made them very wealthy had he done so. He also tells Jimmy to be thankful for what he has.

Jimmy realizes he has a time machine, so he uses it with him, Carl, and Sheen in order to go back 15 years ago in order to get Hugh to invest with McSpanky in McSpanky's Burger Factory and get that money.

Jimmy, Carl, and Sheen travel back in time 15 years. They arrive in the basement of the house, though it looks unfamiliar at first: the basement, where Jimmy's lab would later be, is a simple unfinished utility room. The three go upstairs to the living room, where they find Jimmy's parents (who appear as hippies) dancing to a groovy disco tune.

Glancing around, the kids notice numerous lava lamps, a turntable stereo, a disco ball, and a number of other items common in the 1970s. The decor of the living room is a stereotypical 1970s design: green carpeting with orange rugs, yellow wallpaper with flower designs, "PEACE" posters, and wood panelling on the other walls.

Jimmy introduces himself and his friends, claiming that they came in due to an unlocked door. Hugh and Judy don't recognize the three kids, as they don't actually exist in that time yet. Upon talking with them, Jimmy realizes that his parents aren't even married yet.

Jimmy then has a little talk with his dad, and convinces him to invest in McSpanky's. He also tells him to get "his son" the 1000 Volume Set of the Encyclopedia of Infinite Knowledge to give to him when he's older.

Jimmy, Carl, and Sheen head back to the present, and find that Hugh took Jimmy's advice and invested in McSpanky's, resulting in the Neutron family now being incredibly wealthy, with their house is now made of silver, has fancy chairs, gold bricks, solid gold statues, and even antique duck statues (probably for Hugh). Jimmy is initially very excited, but unfortunately discovers that both Hugh and Judy have been corrupted by their wealth and have become selfish and materialistic snobs who are more interested in their possessions than their son (or other family members, as shown with Hugh refusing to give his own father money for a life-saving operation purely out of stinginess), not even remembering his name. They also put down Carl and Sheen and bribe them to leave with some goldbrick. Once they leave, Judy summons Hilgo, a man-woman, to take Jimmy to his room so he will no longer pester them, and makes Goddard leave the house.

Upon entering his room, Jimmy finds that he has every volume of the 1000 Volume Set of the Encyclopedia of Infinite Knowledge, just as he wanted. Jimmy is excited for a brief moment, but quickly realizes that having the set (or being vastly wealthy in general) is not worth the cost of his parent's unconditional love and dispensed affection, so he and Goddard go back in time to prevent Hugh from the investment, and turn the alternative world back to the original.

Jimmy and Goddard return to the present to find Hugh and Judy back to their original non-wealthy but loving good-hearted selves. Judy tells Jimmy that she and Hugh have decided that since the encyclopedia set will be beneficial to his education, they will postpone their family vacation and use the money to buy it for him. But Jimmy declines, claiming that he heard the set isn't that great, but thanks them anyway. The episode ends with Hugh talking endlessly about what life would be like if his family had $100.00 at the time of the investing.