The Invisible Worm

Season 2, Episode 4

Roses aren't the only things dying at Stagford Lodge Preparatory School. Gardeners Rosemary and Laura are called in to restore the school's flower beds, but stay on as detectives. A mysterious ritual involving a staff member dressed as a deer turns sour on the last day of school when the geography professor is found dead in the dirt with a harpoon wound. Rosemary and Laura must weed out the killer from the school's sinister staff before s/he strikes again.