Danger Rangers Episode 10 Chem Gems Episode Title:Chem Gems.Episode Description:When Scotland Yard is investigating who's been putting chemicals on London's streets, they assume it's the local toy-maker Herbert Dinkwell. The Danger Rangers are called in to help prevent dangerous chemical combinations done by unsuspecting children and soon discover that Herbert's assistants Lonnie and Jenkins are responsible for leaving the chemicals on the streets instead of having them taken to the Waste Processing Plant.