Survivors (1975)

S3E2 A Little Learning

Jenny is on a solo quest to find Greg. Meanwhile, Greg and Agnes encounter an elderly woman named Mrs. Butterworth, who is in a state of panic. She shares her fears of being tormented by what she calls "red Indians." Intrigued, Greg looks into the situation and uncovers that a group of children is responsible for the disturbances at her home. The gang is led by a formidable boy named Eagle, who is determined to keep Greg from getting involved, even as many of the children are succumbing to a strange illness.