Part 1: The Delightful Children from Down the Lane attack Sector V's headquarters with an infestation of hair-eating lice. Part 2: Numbuh 1 has a secret girlfriend who he often neglects because of his Kids Next Door responsibilities. She is forced to use a boyfriend helmet to mind-control Numbuh 1. If the helmet stays on for too long, it will start to merge with Numbuh 1's head and stay on forever.