On 8 April, the following important behind-the-scenes events were known to have occurred:
- 1966 - "The Final Test" was recorded at Riverside Studios 1. (TCH 7)
- 1967 - Episode two of The Faceless Ones was recorded at Lime Grove Studios D. (TCH 10)
- 1970 - Nicholas Courtney signed on for another season as Brigadier Lethbridge-Stewart.
- 2000 - Recording for The Skymines of Karthos took place.
- 2011 - Recording for Army of Death took place at The Moat Studios.
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