Infection from a spider bite causes Romana's personality to change. Meanwhile the Doctor, after discovering that the spaceship society is in a perpetual state of repair and upgrade, has morality issues with the ship's leading scientist who readies himself to perform gruesome experiments on the live marshchild while it's fully conscious.
| Creator | C. E. Webber |
|---|---|
| Actor | Sylvester McCoy, Sophie Aldred |
| Country | United Kingdom |
| Production | BBC |