7 October 1980: birth of Mike Bartlett, writer of the 2017 Twelfth Doctor story Knock Knock.
ii) broadcast anniversaries
7 October 1967: broadcast of second episode of The Abominable Snowmen. The Doctor persuades the monks and Travers that he does not control the Yeti; but the control sphere that they have acquired comes to life...
7 October 1978: broadcast of second episode of The Pirate Planet. The Doctor and Romana realise the true nature of Xanak, ie that it is in fact a pirate planet.
7 October 2018: broadcast of The Woman Who Fell to Earth, the first story in Series 11 and the debut story of the Thirteenth Doctor. The new Doctor makes some new friends, and defeats an alien attack on Sheffield.