The Krotons are a race of cystaline creatures which need metal suits, and a strange liquid to thrive. Although theyre biologiclly immortal. They travel on strange ships called dynotrope, but can slowly killed by impure sulphric acid, they prefer dark enviroments, and cant see very well in bright light.
- There is a sixth doctor audio play which features the Krotons return.
- There is a miniature of a Kroton.