Sontarans are a warrior race, from the planet Sontar in the Melasaran Galaxy.
They are merciless and ruthless soldiers, obsessed with war. They hated the fact a war was going on, without their knowledge or assistance. They believe that gaining supremecy, or die trying is an honour. However being demoted to nurse and caring for the sick and weak is a humilating concept.
They have been at war with the Rutans, shape-shifting aliens from the planet Ruta 3, for so long, they are not even sure they know why.
Sontarans reproduce by cloning, meaning every Sontaran was close to identical. Hovever variations appeared over time, including the number of fingers (A Sontaran has 3 fingers), height or skin colour. Their hatcheries can produce up to 1 million Sontarans with one body, in 4 minutes.
Sontarans absorb energy from a probic vent in the back of their neck. This is also their weak spot (One blow to the vent knocks them out). The penetration of a sharp object into the vent would kill them. Tampering with the energy source could also lead to a reversal effect that could drain the life force of a Sontaran, and melt them from the inside out.