River Song messes up the time stream of the universe by changing a fixed point.

The Doctor takes Clara time traveling on the TARDIS and she questions whether the Doctor sees her as a ghost or living person after seeing the entire life cycle of the Earth.

After investigating a broken portrait, a time votex appears and the Doctor decides to jump through. He then meets himself in a past life and they compare themeselves.

Amelia foreshadows that will be going alone in his exploration as she collapses in the first few seconds and again moments after sending off Jim.

Clara recieves a phone call from the past. The doctor tells her that he hopes she'll continue to be there for him in his new form despite the major changes to his looks and personality.