Episode Title:The Lake Nose Monster.Episode Description:Phineas and Ferb investigate the myth of the legendary "Lake Nose Monster", an inhabitant of Lake Nose. Meanwhile, Doofenshmirtz uses a machine to filter all of the zinc out of the water of the lake, even though he experiences trouble thinking of an evil scheme that could involve zinc, and Candace gets a job as a lifeguard on the lake's beach when Jeremy also works there as a lifeguard.