30 November 1963: repeat of "An Unearthly Child" and first broadcast of "The Cave of Skulls", the first and second episodes of the story we now call An Unearthly Child. The Tardis has landed on a primitive world where the travellers are taken captive by cavemen.
30 November 1968: broadcast of fifth episode of The Invasion. Isobel, Jamie and Zoe enter the sewers and are confronted by a deranged Cyberman.
30 November 1987: broadcast of second episode of Dragonfire. Mel and Ace are pursued by the dragon; the Doctor and Glitz work out where the treasure is.
30 November 1988: broadcast of second episode of Silver Nemesis. Rather confusing battles between the Cybermen and neo-Nazis.