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The bubble universe was a tiny universe which was home to the sentient planetoid known as House. House lured Time Lords from the main universe through the bubble universe rift so it could consume their TARDISes. The Eleventh Doctor and many other Time Lords were drawn to the bubble universe by distress hypercubes, presumably those of House's previous victims. Notably, the bubble universe also included a junkyard filled with dead TARDIS parts left behind by Time Lords lured into House's trap. The bubble universe reached absolute zero 3 hours after House left it while he was inside of the Doctor's TARDIS. (TV: The Doctor's Wife)

The Universe in a Cardboard Box included all the pieces needed to assemble a bubble universe out of Parablox. (PROSE: The Book of the War)

Behind the scenes Edit

In the script for The Doctor's Wife, writer Neil Gaiman described the junkyard as "the Totter's Lane at the end of the universe." (CON: Bigger on the Inside)