 Due to the time travelling nature of the show, the Whoniverse setting has been covered across points from its formation in a big bang event (in 1983's "Terminus" and the 1985 audio drama "Slipback"), to its heat death in the year "100 trillion" (in 2007's "Utopia").Important events shown include the Time War, the formation of the Earth and its eventual destruction in the year "5 billion" (in 2005's "The End of the World"), and the destruction and recreation of the universe (in 2010's "The Pandorica Opens"/"The Big Bang").In his 1983 book "Doctor Who