Morka

A Silurian, also known and credited as "Young Silurian". He, along with others of his race, encountered the Doctor at an underground base in Wenley Moor. Stubbornly believing that his own race was superior, he rejected the notion of sharing the Earth with the humans. He then went behind the back of his leader, and released a human prisoner who had contacted a deadly disease engineered by the Silurians. Believing that his leader failed him, he killed him, and set about reawakening his species and reclaiming the Earth once again. After being tricked into going back to hibernation again, Morka opted to stay behind when there were only a few pods left, willingly giving the Silurian scientist that helped him leadership of the Silurian race. Angry that the Doctor tricked him, he tried to kill the Doctor when he returned to the Silurian base, but he was wounded by a shot from the Brigadier, and later blown up along with the base by UNIT. (DW: Doctor Who and the Silurians)