The Sontarans

The Sontarans were humanoids with large, bulbous heads and short stocky bodies. They had grey-brown skin and deep set features. Sontarans generally had three digits on each hand (two fingers and a thumb). (DW: The Two Doctors) Some Sontarans also had vestigial hair, generally in the form of beards, which grew white with age. (NA: Shakedown) Sontaran blood was green.