Bubble universe rift

The bubble universe rift was a time rift which served as a gateway to another universe. It was through this rift that House lured Time Lords so it could consume their TARDISes. (TV: The Doctor's Wife)

Behind the scenes

 * During the scene in TV: The Pilot in which the TARDIS travels to the Dalek-Movellan war zone, this short scene in which the TARDIS leaves through the rift for the House planetoid is re-used.