Zygons (Earth-1969)

The Zygons are a technologically advanced race of extraterrestrial metamorphic ahape-shifting humanoids from the planet Zygor. They where once the sworn enemies of the race known as the Kree, before the Kree where wiped out. They then waged war on the race known as the Xaranti but during the war, both the Zygon homeworld, Zygor, and the Xaranti home planet were destroyed, as an effect of the Time War. A group of survivers left and soon joined forces with the warrior race known as the Sontarans. The two races made way to Earth, forming a plan with the help of a man named Harold Saxon, who was more than he seemed.