George and Harold have played a trick or two on nearly everyone at Jerome Horwitz Elementary.

When their latest prank causes the school's cranky cafeteria ladies to quit, Mr. Krupp hires a trio of unusual replacements -- who happen to look an awful lot like aliens!

Will that curtain-caped crusader, Captain Underpants, save the day once more?

Or will those outer-space cafeteria ladies have him for lunch?