Azlok

Lord Azlok was leader of the Viperox in 1958. He was allied with General Stark, who was in the US Army. He had made a deal with Stark, so Stark would aid him in his plan. His base was beneath a ghost town which had been abandoned during the Gold Rush. He had a confrontation with the Doctor after he had kidnapped his new companion Jimmy Stalkingwolf. Cassie Rice, the Doctor's other companion, threw a gas canister at him and he was trapped in the flames but managed to escape. He was then betrayed by Stark and he was forced to fly off. (DW: Dreamland)