Either way, this Planet Master popped up as a member of Alexander Luthor, Jr.'s Secret Society of Super Villains.
Master of Arts (postgraduate) | Master of Arts | Master of Business Administration | Master's degree | Master of Science | Animal Planet | master's degree | Master of the Rolls | minor planet | Mercury (planet) | Master | Lonely Planet | Master P | Planet of the Apes | Master of Laws | planet | Master of Fine Arts | Master of Arts (Oxbridge and Dublin) | Master of Divinity | Old Master | Master's Degree | Master and Commander: The Far Side of the World | Forbidden Planet | Master of Wine | Master of Education | His Master's Voice | Captain N: The Game Master | Master of the Horse | Planet Rock | Planet of the Daleks |