"Doomsday Clock" is a song by the American alternative rock group The Smashing Pumpkins, and is the opening track on their album Zeitgeist. Although not released as a single, the song charted on the Billboard Hot 100 and the Pop 100, due to digital sales.
It was released on iTunes for immediate download along with the pre-order for the album on June 19, 2007.
It is also included on the soundtrack for the 2007 Transformers movie. The song appears twice in the film: once as an instrumental-only version during a climactic action sequence, and the second time as a song over the closing credits.
^Mitchum, Rob (July 9, 2007). "The Smashing Pumpkins Zeitgeist". Pitchfork. Retrieved November 20, 2012. "Songs like "Doomsday Clock" and "Tarantula" wave the flag of stoner rock like Black Sabbath and Blue Oyster Cult without embarrassment, and could likely pass for Queens of the Stone Age if it wasn't for that characteristic Corgan whine."