Below are some of the references in the series
The Eleventh HourCracks through time start appearing
The Eleventh HourThe same shape as the crack appears on the TARDIS screen
The Beast BelowThe crack in time appears on the Starship UK
Victory of the DaleksThe crack appears in World War II behind the TARDIS as it leaves
Flesh and StoneThe Doctor and Amy notice the same crack as seen in Amy’s bedroom wall
The Vampires of VeniceRosanna mentions how cracks started opening. Some showed worlds and people, others showed silence, and the end of all things.
Cold BloodThe crack appears under the Earth.
Cold BloodRory gets removed from time, only the Doctor remembers him.
The LodgerThe crack appears as Amy finds her Engagement Ring from Rory.
Rosanna
Some were tiny, some were as big as the sky. Through some we saw worlds and people, and through others we saw silence, and the end of all things.
Below are some of the references in the series
The Eleventh HourPrisoner Zero says that the Pandorica will open and silence will fall.
Flesh and StoneRiver Song says that she will next meet the Doctor when the Pandorica opens.
The Vampires of VeniceThe Doctor and Rory hear the silence.
Below are some of the references in the series
The Eleventh HourA woman says that she has seen the Doctor before.
The Eleventh HourAmelia clearly hears the TARDIS when she couldn’t have.
The Eleventh HourA persons shadow is seen inside Amelia’s house, was it Prisoner Zero or something else?
Victory of the DaleksAmy doesn’t remember the Daleks. The music that follows the crack in time can be heard.
Flesh and StoneThe (future) Doctor explains to Amy that she has to remember something that he told her when she was 7 years old.
Flesh and StoneThe Doctor explains that time can be rewritten, no one remembers the Cyberking, Amy doesn’t remember the Daleks. There are no ducks.
Flesh and StoneAmy’s time.
Cold BloodThe Doctor finds a piece of the Tardis in the crack.
The Pandorica OpensThe Pandorica
The Tardis
The PandoricaPrisoner Zero
The universe is cracked, the Pandorica will open and silence will fall