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.
