Doctor Who Extra

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.

Confidential replacement
Doctor Who Extra was conceived as a smaller scale replacement for Doctor Who Confidential, which ended in 2011 with the Series 6 finale, The Wedding of River Song, having been cancelled by BBC Three. Though Confidential concluded production, plans were announced to revive it in 2013, while short behind-the-scenes features were aired in conjunction with series 7.

In August 2014, in the run-up to the premiere of series 8 and the start of Peter Capaldi's tenure as the Twelfth Doctor, the BBC announced the new behind the scenes show to accompany the series, Doctor Who Extra.

A Doctor Who Extra was released for the first series 9 prequel, Prologue, on 11 September 2015. Multiple mini Doctor Who Extra episodes were then released for each episode of series 9. Regular length Doctor Who Extra episodes in the Series 8 format were released for every story in Series 9 on home media, as well as the series 10 stories The Return of Doctor Mysterio and Twice Upon a Time.

Differing content
The programme sometimes had episodes with significantly different content, depending upon the venue. For example, the episode which accompanied The Return of Doctor Mysterio was radically different in its Fathom Events/BBCA theatrical form than it was in the much shorter form it had as a part of the iTunes release of that story. , differences between the iTunes releases in different markets, as well as those between the US iTunes Store and the BBC Red Button are not well-researched.

Follow-up series
Although every episode of the Capaldi era had an Extra-like companion documentary, the name of the series changed for Capaldi's last series. It morphed, on screen, into Inside Look, save for his final episode. Likewise, it's the spiritual parent of the Whittaker-era Closer Look.

Episodes

 * see List of Doctor Who Extra episodes

Home video releases
The episodes 1 to 13 of Doctor Who Extra were released in November 2014 with the Complete Series 8 DVD.