Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space : (and the Subsequent Assault of the Equally Evil Lunchroom Zombie Nerds)

An alien spaceship has landed on the roof of Jerome Horwitz Elementary School. Three tall aliens plan to overtake the Earth using schoolchildren as their zombie nerd henchmen. Disguised as gigantic lunch ladies, they begin their evil plot. Another job for Captain Underpants!