 When explaining the prevalence of foresight abilities in Pompeii, the Doctor explains Mount Vesuvius temporarily opened a Rift in time and space, which accounts for this, in the episode "The Fires of Pompeii" (2008).In the series 6 episode "The Doctor's Wife" (2011), the Eleventh Doctor (Matt Smith) travels through a time rift to a location "outside" the universe.He comments that his TARDIS should refuel by virtue of being exposed, as with the Cardiff rift, to temporal energies.