Total Collapse Event Incident

The Total Collapse Event Incident was the Time Lord designation for the event in which the Alliance failed to prevent total event collapse, and the Eleventh Doctor's subsequent effort to restore the universe. (TV: Victory of the Daleks, PROSE: Dalek Combat Training Manual)

Big Bang Two
When the Pandorica was opened in 1996, it contained billions of atoms from the universe as it should have been. Some of these were the final traces of whole races erased by the cracks in the universe. As "the perfect prison", the Pandorica was also designed to emit a restoration field to preserve or restore whatever was inside it, preventing prisoners from escaping even by dying. This combination of pre-collapse atoms and the restoration field had a restorative effect on a fossilised Dalek. This seemed impossible, because the Daleks had never existed, having been erased from history; there should have been nothing to resurrect. The Eleventh Doctor thus reasoned that if the restoration field could be transmitted throughout all of space and time, the entirety of the former universe could be extrapolated from the atoms within the Pandorica.

The Doctor used a vortex manipulator to fly the Pandorica directly into the heart of the TARDIS' eternal explosion. Since the TARDIS was exploding at all points in history, the particles and restoration field were present at every point in time. A new universe was created based on the old one, but with the Doctor having never existed, as he had to 'seal' himself outside the universe in order to close the cracks. "Rebooting" the universe caused this new universe to proceed undamaged, because the TARDIS had not exploded. Thanks to the ability the crack in her room had given her to restore things erased by remembering them, on 26 June, 2010, Amy Pond brought back, at least her parents and fiancé Rory, and at Rory's and her wedding, the Doctor after she focused on remembering him. (TV: The Big Bang)