Doomsday Machine may refer to:
Doomsday device, a hypothetical weapon which could destroy all life on the Earth Doomsday Machine (film), a 1972 science-fiction film The Doomsday Machine (book), a 2012 non-fiction book arguing that nuclear energy is a kind of 'Doomsday' strategy "The Doomsday Machine" (Star Trek: The Original Series), a 1967 episode of Star Trek: The Original Series Doomsday Machine (album), a 2005 album by melodic death metal band Arch Enemy The Doomsday Machine: Confessions of a Nuclear War Planner (2017), book by Daniel Ellsberg