The hosbital for the people taken and sent back to the rift  and the one patient who was supposed to be 15 but was given 40 years for his time and went mad due to looking into a dark star.

What was sad was him trying to convince his mum it was him due to him beeng burnt and gaed 40 years.

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Doctor who - Wibbly Wobbly Timey Wimey!
used to show time travel's effects.