On 27 April, the following important behind-the-scenes events were known to have occurred:
- 1966 - Pre-filming for The Savages began at Ealing Studios. (TCH 8)
- 1967 - Pre-filming for The Evil of the Daleks continued on Stage 3A/B of Ealing Studios. (TCH 10)
- 1970 - Director Douglas Camfield suffered a minor heart attack during the studio recording of episode one of Inferno, ending his involvement on that serial. Producer Barry Letts had to immediately take over as director.
- 2005 - Recording for Scaredy Cat took place at The Moat Studios.
- 2010 - Recording for Project: Destiny took place at The Moat Studios.
- 2015 - Recording for Foreshadowing and The Man Who Wasn't There took place at The Moat Studios.
- 2018 - Recording for The Eleventh Doctor Chronicles and Ravenous 2 took place.
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