Category 7: the end of the world: A deadly storm morphs from Category 6 to 7 while the government falls prey to terrorists.

10.5 apocalypse: In the aftermath of a massive earthquake, a Texas fault line threatens the country's largest nuclear reactors.

2012: doomsday: In the days leading up to December 21, 2012, four strangers are drawn to an ancient Mexican temple.

Apocalypse: Two crews battling for control of a deserted spaceship are threatened by a much more destructive mission.

2012: supernova: An astrophysicist devises a desperate plan to shield Earth from a supernova.