Ep 16. Enemy of Weston

With the annual Charity Picnic just a week away, Annie discovers that the local swimming pond is polluted. She meets resistance wherever she takes her evidence, however, as nobody wants the picnic cancelled. The twins, with the help of Paul and Joey, set out to catch the culprit who is dumping toxic chemicals into the pond. Annie uses carious water analysis techniques to prove that there are dangerous chemicals in the pond and the twins design and build a simple seismograph to help them catch the trucker whos dumping the chemicals.