Dexter's Laboratory Wiki
Bygone Errors "Bygone Errors" Premiere Order
"Folly Calls"
"Voice Over" Voice Over
Bygone Errors "Bygone Errors" Production Order
"Folly Calls"
"Voice Over" Voice Over
Folly Calls
Season 4, Episode 9c
Episode name reference to/pun on: The word "follicle", the scientific term for hair.
Folly calls
Air date September 12, 2003
Production number 408c
Written by Bobby London
Storyboard by Bobby London
Directed by Don Judge
Chris Savino

Folly Calls is the third part of the ninth aired and eighth produced episode of season 4 in Dexter's Laboratory.

In this episode, Dee Dee is trimming her hair. While doing so, she accidentally cuts off one of her pigtails. Dexter gives her a hair growth potion to restore her hair However, Dee Dee uses too much of the potion on her hair, causing it to grow out of control.

The episode was produced in 2002 and premiered on Cartoon Network in the United States on September 12, 2003.


Dee Dee is in her room brushing her hair and putting it into her pigtails. Just after, a string of hair pops out and Dee Dee cuts both it and one of her pigtails off. Dee Dee then uses glue to fix her pigtail, but it, along with the reattached pigtail, slides off.

Inside Dexter's laboratory, Dexter looks at Dee Dee, then bursts out laughing. Dee Dee then follows Dexter on her knees begging for his help, but he refuses. After a personal threat, Dexter reluctantly helps Dee Dee out. He has one of his claw machines pluck a string of Dee Dee's hair, which is then converted into a hair tonic. Before handing the tonic to Dee Dee, Dexter reminds her to use only one drop of it. Dee Dee, with disregard to her brother's warnings, takes the tonic and leaves the lab.

Back in Dee Dee's room, she dumps the hair tonic on her head, prompting her hair to grow at an accelerated pace. She runs back into Dexter's lab and he comes up with a quick fix for her hair solution by turning Dee Dee's hair into two giant pigtails. Suddenly, Dee Dee's hair grows to immense size, covering her and Dexter. In the living room, Dexter slowly sneaks down to Dad and pulls his hair off. Instead, Dexter uses a scalpel and scrapes some skin off Dad's head then races back to his laboratory.

In there, Dexter swims through Dee Dee's hair to make the antidote, which he gets. Outside the lab, the tremors make the hair tonic roll out of Dee Dee's room and into Dad's hand. Back inside Dexter's laboratory, he cuts his way through Dee Dee's hair to reach Dee Dee herself, who is wrapped up in her own hair. With the antidote, Dexter pours it on Dee Dee's hair, reversing the hair tonic's effects. Happily, Dee Dee then dances with Dexter and reminds him to be more careful with his inventions. Meanwhile, Dad is in the bathroom trying out the hair tonic and receives disastrous results just as the episode ends.




  • Dee Dee didn't count right because she missed 98.
  • The scene where Dexter laughs hysterically at Dee Dee was used as a visual on one of the show's Boomerang bumpers before the intro cues.

Episode connections[]

  • The episode plot is similar to "You Vegetabelieve It!." Similarly, Dee Dee warns Dexter about leaving his inventions in "the hands of the idiotic", referencing how Dee Dee was responsible for the backyard growing out of control as a result of the growth potion Dexter made for her.

Production Notes[]

  • Although this episode premiered in the United States on September 12, 2003, it was actually produced in 2002 according to the credits.
    • This episode was finished on November 15, 2002.[1]


  • Dee Dee's uvula is incorrectly animated when she screams, being inverted and pointing upwards, rather than pointing down towards her throat.