Synopsis
Doctor Who Extra was a documentary spin-off series attached to episodes of Doctor Who. Otherwise exclusive to the BBC Red Button on television and BBC iPlayer online, the initial installment was screened in cinemas following the theatrical simulcast of the series 8 premiere, Deep Breath. In the series 8 format, each instalment has a runtime of just over 10 minutes, similar to that of the former Confidential Cut Down. During series 9, episodes were much shorter, ranging between 1 and 2 minutes only.
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