ADVENTURE: Ducks Unlimited has played an important part in helping to manage the wetlands all over North America. Chuck and Andy find out just how important the wetlands are and what's being done to preserve them.

THE LAB: Dr. G comes up with a fascinating new way to filter dirty water, and explains how the water cycle works. Unfortunately for GP, the mad-ones' water purification system is less than stellar and they all end up with a belly ache. The emphasis in this episode is about the importance of clean, drinkable water.