On 20 October, the following important behind-the-scenes events were known to have occurred:
- 1964 - The Hidden Planet was officially rejected by script editor David Whitaker.
- 1977 - Full scripts for The Pirate Planet were commissioned from Douglas Adams.
- 2009 - Recording for Legend of the Cybermen took place at The Moat Studios.
- 2011 - Recording for the first series of Counter-Measures took place at The Moat Studios.
- 2017 - Recording for I Am The Master took place at The Moat Studios.
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