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Absentminded scientist Barnaby Fulton is discouraged when his
formula, which he hopes will reverse the ill effects of aging, proves
ineffective on his test chimpanzees, Rudolph and Esther. Barnaby is
encouraged by his wife Edwina, who loves her brilliant husband despite his
eccentric behavior.
One morning, when Barnaby arrives at the Oxly Chemical
Factory, where he works as a free-lance scientist, he is summoned to
president Oliver Oxly's office. The elderly Oxly hopes that Barnaby's
formula will be financially successful, and will enable him to pursue his
curvaceous secretary, Lois Laurel. Oxly shows Barnaby the ad campaign
he has devised for the formula, which he has named B-4, but Barnaby urges
him to be patient. Oxly's hopes are raised when it appears that the
aged Rudolph is bounding around like a youngster, but it is revealed that
Rudolph's numbered uniform was inadvertently switched with that of the
younger, mischevious Esther. Barnaby begins work, but when he leaves
the laboratory, Esther frees herself and, copying Barnaby, mixes a batch of
the ingredients for his formula. Just before Barnaby returns, Esther
pours her chemicals into the water cooler, after which Barnaby mixes his own
batch. Against the wishes of his assistant, Dr. Jerome Lenton, Barnaby
swallows the formula, and its bitter taste forces him to get some water from
the cooler.
Soon Barnaby notices that his bursitis no longer hurts, and
that he can see without his thick glasses. Overcome by a feeling of
euphoria, Barnaby leaves the laboratory and has his mature haircut changed
to a more youthful crew cut, then buys a loud, checked sports coat.
Next, at the car dealership, Barnaby purchases a sports car, and asks Miss
Laurel, who has been sent to find him, to go for a ride. Barnaby
flirts with Miss Laurel as they race, then roller skate and swim, and she
rewards him with a kiss on the cheek. She pouts upon discovering that
Barnaby is married, however.
After his return to the lab, Barnaby falls asleep. When
he awakens, the effects of the formula have worn off, although the
just-arrived Edwina is nonplussed by the tale of his antics, as well as the
lipstick on his cheek. Barnaby, who states that the formula made him
act like a twenty-year old, assures Edwina that the kiss meant nothing.
But in order to keep her husband from experimenting on himself again, Edwina
takes the next batch of formula he concocts. Edwina drinks a cup of
water and soon she, too, is acting like a twenty-year old. Edwina and
Barnaby elude the inquiring Oxly, after which Edwina demands that they go to
the hotel where they honeymooned.
At the hotel, Edwina's energy exhausts Barnaby and, when they
finally prepare for bed, Edwina, acting like a new bride, begins to cry for
her mother. The couple are soon quarreling. When Barnaby gently
pushes Edwina away from his fallen glasses, she throws him out of their room
and calls their lawyer, Hank Entwhistle, to tell him that Barnaby has
brutalized her and that she wants a divorce. Blind without his
glasses, Barnaby winds up in the laundry room, where he spends the night.
In the morning, the fully recovered Edwina takes Barnaby home
and tells Hank, who is in love with her, that she wishes to call off the
divorce. Disheartened by Edwina's brief wish to leave him, and her
revelation that Hank had once kissed her, Barnaby decides that his formula
causes only chaos and should be destroyed.
At the lab, Edwina uses the cooler water to brew a pot of
coffee and, after several cups, she and Barnaby begin to act like ten-year
olds. Oxly, who has heard about the success of the formula, calls in
the board of directors and urges them to offer Barnaby anything he wants for
the rights. Barnaby and Edwina are then brought to the meeting, where
Barnaby asks for a zillion dollars for his formula. Barnaby and Edwina
escape the confines of the lab but, as they walk home, Edwina's attempts to
play annoy the now girl-hating Barnaby.
Barnaby then runs off to join some youngsters who are playing
"Indian," while Edwina returns home and calls Hank to complain about
Barnaby, then takes a nap. As Edwina sleeps, Barnaby dresses like an
Indian and talks his little cohorts into scalping Hank, of whom he is still
jealous. When a recovered Edwina awakens, she discovers that a
neighbor's baby, Johnny, has crawled into her bed, and mistakenly assumes
that Barnaby has taken an overdose of the formula and reverted to infancy.
While Edwina dashes to the laboratory with Johnny in her arms, Barnaby and
his pals succeed in capturing Hank and cutting his hair into a mohawk style.
At the laboratory, Oxly, Lenton and the other astonished
scientists gather around Johnny, whom they, too, believe to be Barnaby.
Edwina lays the baby down on Barnaby's office couch, hoping that if he
sleeps, he will return to normal. While the men pace outside, they
drink water from the cooler, and Oxly orders that the bitter-tasting water
be thrown out. Barnaby then climbs through the window to his office,
and Edwina soon finds him. Realizing her mistake, Edwina laughingly
greets her recovered husband, then goes with him to the outer laboratory.
There, they are amazed to see Oxly, the board members and the scientists
acting like children, until Lenton deduces what Esther had done.
Content to leave Oxly chasing Miss Laurel with a seltzer bottle, the Fultons
leave.
Three days later, with a new Oxly contract ensuring his
future, a romantic-minded Barnaby tells Edwina that a person is old only
when he forgets that he is young. |