Thawn

Thawn was the controller of the methane refinery located on Delta III. He secretly conspired with Rohm-Dutt to have the native Swampies wiped out. When Kroll appeared, he tried to kill it with a orbital strike, the Doctor cut the power preventing halting the countdown. The swampies attacked the refinery and killed Thawn with a thrown spear. (DW: The Power of Kroll)