Time field

From Tardis Wiki, the free Doctor Who reference

The Cracks were a series of splinters in the "skin of the universe," according to Prisoner Zero. The pattern of the Cracks is always the same, and the cause remains unknown. When discussing the cracks with Prisoner Zero, the Doctor stated that somebody must have opened the cracks. When he was asked if he knew what the cause was, the Doctor remained silent. (DW: The Eleventh Hour)

List of Cracks

Crack Gallery