Editing Mission to the Unknown (section)

=== Casting and filming ===
[[File:Bundesarchiv Bild 102-16196, Nürnberg, Reichsparteitag, SA- und SS-Appell.jpg|thumb|right|upright=1.2|For the design of the Daleks' conference room, [[Raymond Cusick]] was inspired by the [[Nuremberg rallies]].{{sfn|Wright|2017|p=53}}{{sfn|Pixley|1998|p=25}}|alt=A distant photograph of a Nazi rally, with large crowds on either side of a long empty stretch with Nazi flags at the end.]]

"Mission to the Unknown" was unique in that it does not feature any of the main cast or the [[TARDIS]]{{sfn|Wright|2017|p=46}}{{sfn|Muir|1999|p=116}}—the only serial in the show's history not to feature [[The Doctor (Doctor Who)|the Doctor]] at all{{sfn|Muir|1999|p=116}}—a decision made partly to save money on their fees.{{sfn|Wright|2017|p=50}} Despite not appearing in the episode, [[William Hartnell]] was still credited for portraying [[First Doctor|the Doctor]], while [[Maureen O'Brien]] and [[Peter Purves]] received credits in ''[[Radio Times]]'' as [[Vicki (Doctor Who)|Vicki]] and [[Steven Taylor (Doctor Who)|Steven Taylor]], respectively, but not in the episode itself.{{sfn|Wright|2017|p=59}} Young had previously starred as Kal in the first ''Doctor Who'' serial, ''[[An Unearthly Child]]''; he was excited to work with Hartnell again but disappointed when he discovered his absence.{{sfn|Wright|2017|p=52}} Cartland had also appeared in ''Galaxy 4'', directed by Martinus. The Dalek voices—provided by regular actors [[David Graham (actor)|David Graham]] and [[Peter Hawkins]]—were pre-recorded in [[Lime Grove Studios]] on 4 August 1965.{{sfn|Wright|2017|p=52}}

The episode was Richard Hunt's first on ''Doctor Who'' as set designer; he made the jungle design, while series veteran [[Raymond Cusick]] on the rocket and message launcher, made both from stock set elements and by Shawcraft Models. For the Daleks' conference room, Cusick was inspired by the [[Nuremberg rallies]].{{sfn|Wright|2017|p=53}}{{sfn|Pixley|1998|p=25}} The episode used [[stock music]] composed by [[Trevor Duncan]].{{sfn|Wright|2017|p=53}} Pre-filming for "Mission to the Unknown" took place on 25 June 1965 at [[Ealing Studios]]; the scene in which Garvey mutates into a Varga plant was recorded on [[35 mm movie film|35 mm film]]. Rehearsals for the episode began on 2 August at the Territorial Army Drill Hall on [[Uxbridge Road]],{{sfn|Wright|2017|p=52}} and the episode was recorded in Studio TC4 of the [[Television Centre, London|Television Centre]] on 6 August. The final scene of ''Galaxy 4'' was recorded alongside the episode so as to avoid re-hiring Jackson and rebuilding the set;{{sfn|Wright|2017|p=53}} the scene was later inserted into ''Galaxy 4'' during editing.{{sfn|Wright|2017|p=33}} Four of the Dalek props from ''The Chase'' were used in the episode.{{sfn|Wright|2017|p=53}} Recording for "Mission to the Unknown" cost {{GBP|2,440}}.{{sfn|Howe|Walker|Stammers|1994|p=206}}