Shada is a story from the British science fiction television series Doctor Who. Written by the series' script editor Douglas Adams, it was intended as the final serial of the 1979–80 season (season 17) but was never originally completed, owing to strike action at the BBC during studio recording.

The BBC released a completed version of Shada in 2017, with missing dialogue newly recorded by the original cast, using the same audio equipment employed in the initial shoot, and animated by the team that undertook the reconstruction of the 1966 serial The Power of the Daleks. This version was released on DVD and Blu-ray in 2017, and broadcast on American television in 2018.

A new version with enhanced animation and split into six episodes was released on 20 December 2021, as part of a Season 17 Blu-ray boxset.

Previous attempts to present the story include a narrated reconstruction for BBC Video; a re-imagined audio play by Big Finish Productions, also offered with basic Flash imagery on BBCi and the BBC's Doctor Who website; and a novelisation by Gareth Roberts, based on the latest shooting scripts, with the author's own additions.

After the production halt, Adams expressed a low opinion of the script and was content to let it remain obscure, turning down offers to adapt the story in various forms. He once claimed that when he had signed the contract allowing the script's 1992 release (accompanying the serial's VHS reconstruction), it had been amongst a pile of papers sent over by his agent, and that he was unaware of what he was agreeing to. were re-released together on DVD on 7 January 2013 as The Legacy Collection (UK) or simply Shada (North America).

2017 animated restoration

On 24 November 2017, an effort to complete the serial officially, using newly recorded dialogue from the original cast (using the serial's original recording engineer and audio equipment), and new animated footage to complete the missing segments, was released as a digital download; DVD and Blu-ray releases followed on 4 December that year, in Region 2. The new sequences were animated by the same team that undertook the 2016 animated edition of the 1966 serial The Power of the Daleks,

A two-disc Region 1 DVD release was originally set to be made available on 9 January 2018; this was later postponed in the US and Canada to 4 September that year. The serial was released on 10 January 2018 in Region 4.

The final completed version received its US debut broadcast on 19 July 2018, on BBC America, with guide data giving the episode title as "The Lost Episode" rather than "Shada".

2021 animated restoration

Season 17 of Doctor Who was released on Blu-ray on 20 December 2021 as part of the Collection series, including a new version of Shada with enhanced animation. Whereas the 2017 version was only available in omnibus form, the new version was presented in the form of six separate episodes.

Ian Levine animated version (2011)

In 2010, Ian Levine funded an unofficial project to complete the original Shada story using animation and the original voice actors, minus Tom Baker and David Brierley, to complete the parts of the story that were never filmed. John Leeson replaced Brierley as the voice of K9, and Paul Jones (voice actor and commercial radio producer) replaced Tom Baker as the Doctor.

Audio book

AudioGo released an unabridged audiobook of Roberts' novelization on 15 March 2012. Narrated by Lalla Ward, with John Leeson voicing K9, it runs 11 hours and 30 minutes. It was made available for download or on 10 CDs (CD , Download ). Vanessa Bishop reviewed it favourably for Doctor Who Magazine, singling out Simon E. Power's sound design for special praise.

Reviews

Paul Cornell, Martin Day, and Keith Topping gave the serial (at the time in the form of the 1992 VHS reconstruction) a mixed review in The Discontinuity Guide (1995), saying;