- Large bulging heads
- Short stocky bodies
- Three digits on each hand
- Fed on pure energy, absorbed via a vent on the back of their necks
- Consisted solely of males
- Wore distinctive battle armour, thick & bulky grey or blue suit
- Obsessed with war, hated the idea of a great war going on without them
- Did not fear death, would rather be court-martialled than show pain
- Considered it honourable to face battle "open skinned", without a helmet on
- Created by the Kaveetch, as a clone army in their fight against the Rutans
- 1975: Experimented on humans to test their combat abilities before an invasion
- 2008: Tried to use a terraforming device to convert Earth into a Sontaran world
