Doomsday Clock #1 variant cover - Superman by Gary Frank
Doomsday Clock #3 variant cover - Batman by Gary Frank
Doomsday Clock #5 variant cover - The Joker by Gary Frank
Doomsday Clock #6 variant cover - Mime and Marionette by Gary Frank *
Doomsday Clock #7 variant cover - Rorsarch by Gary Frank
Doomsday Clock #8 variant cover - Bubastis by Gary Frank
Doomsday Clock #8 variant cover - Superman and Ozymandias by Gary Frank