Robo Knight

While on a nature field trip, Emma and Noah discover that chemicals are still seeping into a stream from an old factory. They gather samples to test at the school lab, but are interrupted when other students discover a gigantic footprint that Mr Burley believes belongs to Bigfoot. Later, the team comes face-to-face with Hisser, Bigs and Bluefur - mutant monsters created from the toxic waste left by the factory.