i) births and deaths

10 May 1998: death of Dalek operator Robert Jewell

10 May 2017: death of Geoffrey Bayldon, who played Organon in The Creature from the Pit (1979) and the alternate timeline Doctor-who-never-left-Gallifrey in Big Finish audios Auld Mortality (2003) and A Storm of Angels (2005). Also Catweazle.

ii) broadcast anniversaries

10 May 1969: broadcast of fourth episode of The War Games. The Doctor and Zoe start to explore Central Control, and in a chilling moment the Doctor and the War Chief recognise each other.

10 May 1974: broadcast of fourth episode of Revenge of the Cybermen, ending Season 12. The Doctor succeeds in deflecting the Nerva beacon so that the Vogan's missile destroys the Cybermen.

10 May 2008: broadcast of The Doctor's Daughter. The Doctor, Donna and Martha land on the planet Messaline where they are caught up in a war between humans and the Hath, and encounter Jenny, the Doctor's newly cloned daughter.

10 May 2010: broadcast of Mutant Copper, eighteenth episode of the Australian K9 series. A robot policeman goes rogue.

10 May 2020: webcast of The Zygon Isolation. Osgood talks to Osgood in the pandemic.