Part 1: The KND investigates why people are getting mustaches. They end up showdowning the "head mustache", but they're in for a surprise of who's to blame. Part 2: Numbuh 1's dad is grabbed by a fishing line along with other dads on the lake, and pulled up to some kid's house above the water. He decides that Numbuh 1's dad is his new dad, so Numbuh 1 battles it out with the sousaphone-playing dork for his father.