Howling:Everything from Series 5 onwards takes place in a different timeline

This is my theory: When the Doctor first met Amy, the universe was already in the process of being ripped apart by the Time Cracks, causing such anomalies as things happening or existing without causes, i.e. Amy herself. Whole chunks of history were disappearing. But after Amy summoned the Doctor back into existence at the end of "The Big Bang", not only did the whole universe now have a different timeline, but the Doctor's timeline was changed too. In order for him to be anchored to reality, a whole new past was invented for the Doctor. He's still the Eleventh Doctor, but his previous ten lives no longer exist as we originally saw them; they've been adapted to fit the new post-Pandorica universe. For example, the Doctor might still remember first meeting River in the Library while in his tenth incarnation, but it's possible now that Donna wasn't with him then. Also in his tenth incarnation, he met Sarah Jane Smith again, but that doesn't necessarily mean that Rose and Mickey were with him. EJA 18:03, May 11, 2011 (UTC)