He tells her that her parents had been erased by the crack in her wall and urges her to remember them .
The Doctor realises that Amy is connected to the cracks in the universe which originated from a temporal explosion on her wedding day .
Doctor tells Amy that Amy 's parents had been erased by the crack in her wall and urges her to remember them .
The Doctor realises that Amy is connected to the cracks in the universe which originated from a temporal explosion on her wedding day .