When some very creepy things start happening around school, the kids at Herrington High make the chilling discovery that confirms their worst suspicions: their teachers really are from another planet!

The counselors of Pine Hills Summer Camp are getting the grounds ready for the season. While they set up, a mysterious girl enters the camp after a night of bloodshed. And there are things following her as well.

This educational film is an introduction to the ergot fungus, including lifecycle, cultivation, medicinal uses, and toxic effects. The film also summarises methods for the chemical extraction of ergoline compounds.

Dr Michael Mosley explores the bizarre and fascinating world of parasites by turning his body into a living laboratory and deliberately infesting himself with them.