End of the world
The end of the world was a term describing the day of death and destruction of a planet and its inhabitants.
Rose Tyler believed the Nestene invasion of 2005 to be the end of the world until she stopped it. (TV: Rose)
The Ninth Doctor characterised Earth Death in the year 5,000,000,000 as being the end of the world to Rose. (TV: The End of the World)
When the Slitheen turned off the Sun in 2008, Chrissie Jackson described it as the end of the world. (TV: Revenge of the Slitheen)
During the invasion of Daleks in 2008 after the Earth had been relocated in the Medusa Cascade, a Local town drunk claimed to Rose that it was the end of the world. (TV: The Stolen Earth)