On Monday, 25 June 2007, at 10:01 AM, Donna Noble made a seemingly tiny decision by turning left on Little Sutton Street, heading for the Chiswick High Road, ignoring her mother's pleas to work for Jival Chowdry and turn right, towards Griffin's Parade. In the long run, this decision saved the Earth several times over. Her job at H.C. Clements resulted in her meeting the Tenth Doctor and saving his life beneath the River Thames.
A Time Beetle on Donna's back created a parallel world, where Donna turned right instead. This meant her never joining H.C. Clements and thus never meeting Lance Bennett and becoming engaged to him. Instead, she took a job as Jival Chowdry's personal assistant. Six months later at Christmas, the Tenth Doctor died because of this and the whole world turned to chaos. (TV: Turn Left)
On Friday, 25 June 2008 (PROSE: Stop, Thief!), The Eleventh Doctor met Amy Pond in Leadworth after twelve years of waiting. A Multi-form called Prisoner Zero, who had escaped through the crack in Amy's wall, attacked. The Atraxi arrived, threatening the destruction of Earth if Prisoner Zero did not surrender. The Doctor created a computer virus for the Atraxi to track back to its source in Leadworth (spread by Jeff). The Doctor also transmitted Prisoner Zero's disguises to the Atraxi so it couldn't hide in the bodies it had been disguised as. It then took the form of Amy; the Doctor made Amy think of Prisoner Zero's original form. Now in plain sight, Prisoner Zero was captured by the Atraxi, who left. The Doctor took a test drive of his refurbished TARDIS, (TV: The Eleventh Hour) returning exactly two years later. (TV: The Eleventh Hour, PROSE: Rory's Stag, Stop, Thief!)
Later that night, the Eleventh Doctor returned to Amy Pond's house moments after two years after the incident with the Atraxi and Prisoner Zero from 2008 and invited her to travel with him. (TV: The Eleventh Hour) They left together, and returned at 11:55 PM, after escaping from the wreckage of the Byzantium. (TV: Flesh and Stone) After Amy kissed him, the Doctor made to pick up Rory from his stag party. (TV: The Vampires of Venice)