On 22 April, the following important behind-the-scenes events were known to have occurred:
- 1966 - "Don't Shoot the Pianist" was recorded at Riverside Studios 1. (TCH 7)
- 1967 - Episode four of The Faceless Ones was recorded at Lime Grove Studios D. (TCH 10)
- 2001 - Recording for Dust Breeding took place at The Moat Studios.
- 2008 - Recording for The Destroyer of Delights and The Chaos Pool took place at The Moat Studios.
- 2011 - Recording for Energy of the Daleks took place at The Moat Studios.
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