Theory:Doctor Who television discontinuity and plot holes/Heaven Sent

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< Theory:Doctor Who television discontinuity and plot holes
Revision as of 18:35, 29 November 2015 by 90.154.67.167 (talk) (2.1 Page created)
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The obvious one. If all the rooms in the castle reset - how is the Doctor able to slowly wear down the diamond wall over multiple incarnations?

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