Plot summary
Malcolm starts to date Nikki ( Reagan Dale Neis ), a girl from his school that he tutors in his free time. It becomes increasingly complicated to manage their alibis and avoid her dad who dislikes him. Hal and Lois cannot have sex for a week while Lois takes an antibiotic regimen. They find new energy to care for the kids and improve the house, but have a hard time staying apart. At the ranch, Otto is furious with a neighboring ranch repeatedly destroying the fences that Francis has built to keep the horses inside, so that their own cattle can reach water. In the end, Francis proposes simply adding a gate in the fence.
Credits
Adapted from Wikipedia contributors, Malcolm in the Middle season 4. HTML formatting and reference markers removed.