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On 6月25日, the following important behind-the-scenes events were known to have occurred:
- 1965 - "A Battle of Wits" was recorded at BBC Television Centre Studio 4. (INFO: "A Battle of Wits")
- 1965 - Pre-filming for Galaxy 4 concluded at Ealing Studios. Pre-filming for Mission to the Unknown also took place on that day at Ealing, showing Jeff Garvey mutating into a Varga plant. (TCH 6)
- 1969 - A full script was requested from David Whitaker for The Carriers of Death. He submitted two in July.
- 1980 - Studio filming for Meglos took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Fourth Doctor)
- 1987 - Location filming for Delta and the Bannermen took place. (Doctor Who The Handbook: The Seventh Doctor)
- 1998 - Big Finish's audio adaptation of the novel Oh No It Isn't! was recorded. This was Big Finish's first-ever recording session.
- 2009 - The Big Finish audio story A Thousand Tiny Wings was recorded at the Moat Studios.
- 2012 - The Big Finish audio story The Flames of Cadiz was recorded at the Moat Studios.
- 2013 - The Big Finish audio story Scavenger was recorded at the Moat Studios.
- 2015 - Filming wrapped on Face the Raven.
- 2016 - Big Finish confirmed the audio box set The Unbound Universe.