"Dexter's Laboratory" is an animated television series that follows a young boy named Dexter, who is a genius inventor with a secret laboratory hidden behind a bookshelf in his room. He spends his time creating various inventions and conducting experiments, often leading to humorous and chaotic situations. The show also features Dee Dee, Dexter's mischievous sister, who frequently disrupts his experiments. Other characters include Mandark, Dexter's rival, and Mom and Dad, who are oblivious to Dexter's scientific endeavors. The series combines elements of science fiction and comedy, appealing to both children and adults.