Mary-Kate and Ashley in Action!

Operation Evaporation (1x5)

Air date: Nov 17, 2001

When rivers, lakes and oceans begin to rapidly evaporate, Mary-Kate and Ashley must outsmart and outmaneuver their old nemesis, the eccentric, cheese-munching Clive Hedgemorton-Smythe, in order to stop his plans to control all of the world's water.