"Puberty all over again... fantastic!" -- The Master The Seventh Master is the renegade Time Lord, the Master, in his seventh on-screen (and youngest) incarnation. He uses the Earth's fear of alien invasion to take over Earth by tricking humans into believing he was a benevolent, wealthy human. After he was defeated, he tried to brainwash groups of people within Washington DC during the Cold War in hopes of creating a nuclear holocaust. He then tried to take over New Gallifrey by invading the planet with new allies, the Daleks.