Malcolm in the Middle S06 E15 Chad's Sleepover

"Family. The weirdest people you'll ever meet."

After Hal forbids Dewey from inviting his peculiar classmate Chad over for a sleepover, Dewey quickly finds out that his father had good reason to warm him. Meanwhile, Malcolm and Reese find out that they are not as popular as they once thought, then plot "revenge" on their classmates.