On 27 April, the following important behind-the-scenes events were known to have occurred:
- 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.