16. Water Park

Complete story — includes the ending

The family takes a trip to a water park, where Lois and Hal try to avoid the boys and have fun. Malcolm and Reese engage in an escalating war of pranks. After they spill Lois and Hal's food and drink, she berates them at the top of a large water slide. Malcolm pushes her in, but she grabs both of them they go down together as she still yells. Dewey, unable to go because of an ear infection, is left with a strict elderly babysitter, Mrs. White ( Bea Arthur ), who he bonds with, but she collapses and is taken away in an ambulance. Dewey chases a blowing red balloon, and wanders off. Spangler learns that Francis has been letting him win at pool to keep him in a good mood, threatening to punish Francis if he loses again, while the other cadets threaten to beat him up if he wins. When Francis misses an easy shot, Spangler starts trying to throw the match, resulting in both trying their best to lose.