When Dee Dee accidentally cuts off one of her pigtails, Dexter gives her a hair growth potion to get some of her hair back. However, she uses too much of the hair potion, causing her hair to grow to immense sizes.
Dee Dee is up in her room brushing her hair so that it will be just perfect, then a hair sticks up and Dee Dee tries to comb it down but it is just no use. Then she gets out some scissors and tries to cut the hair off. When she does, she accidentally cuts off one of her pigtails as well. Dee Dee starts screaming and running around because of her messing up her hair. Then she has an idea to glue it back on, but it just slips right off.
Then, Dee Dee goes to see Dexter about it. When Dexter sees what she has done to her hair he starts insanely laughing at her. Dexter then refuses to help her with her problem, but Dee Dee threatens to crush him like a bug if he doesn't help her. Dexter quickly gets to work making something to help her. He ends up making a hair growth tonic for her and strongly advises her to only pour one drop onto her head, as the tonic is extremely strong and concentrated.
Dee Dee goes into her room and ends up dumping the entire bottle on her head, which makes her hair grow extremely rapidly and it fills up the entire room. Dee Dee starts running back into Dexter's lab and without even looking at her, Dexter says that she used more than one drop. Dee Dee tells him that she did use one drop. She just used one really big drop.
Dexter tries to think of an invention to make her hair go back to normal size again. So, he goes to his Dad who is watching a commercial about hair transplants. Dexter takes Dad's hair which is really a wig revealing Dad to be bald and he scrapes some bald skin off of his scalp and runs off. Dexter uses Dad's bald skin to create a potion. Dexter gets into a machine that cuts through Dee Dee's hair and he uses the potion on Dee Dee to make her hair go back to normal again. Dee Dee yells at Dexter for using the potion in the first place and leaves. At the end of the episode, Dad finds the hair growth potion and uses it on himself.
It was revealed that Dad was bald in this episode.
In the beginning of the episode, Dee Dee was brushing her hair and counting to 100.
Even if looks like that it was unfair that Dee Dee blamed Dexter for the troubles caused for the tonic when she used it incorrectly, in certain way she was right, because considering that Dexter had the time to create the hair tonic, he also could easily apply the tonic to Dee Dee and after put the bottle safe in a storage in his laboratory, but instead, he was negligent to give the bottle to Dee Dee and tries to explain her how use it, despite knowing that Dee Dee is too stupid to understand his explanations. Especially considering the events of You Vegetabelieve It!, Dexter should know that is unwise to let Dee Dee keep a chemical for her uses without watching.
Dexter's Laugh was used in Boomerang's Dexter's Laboratory Bumper Intro.
For some reason, Dee Dee's uvula is animated upside down.
Although "Height Unseen" and "Bygone Errors" and this episode aired on September 12, 2003, they were actually made in 2002 according to the credits.
These episodes completed production in November 2002.