A Failed Lab Experiment is the second segment of the fourth episode in season 3 of Dexter's Laboratory. It first aired on November 30, 2001 as part of Cartoon Network's weekly programming block "Cartoon Cartoon Fridays".
In this episode, Dexter invents a pair of X-ray glasses that allows him to see through solid objects. However, the invention backfires and makes Dexter see through people's clothes, putting him in a tense situation.