26 November 1929: birth of William Dysart, who played Alexander McLaren in The Highlanders (1966-67) and Reegan in The Ambassadors of Death (1970).
26 November 1966: broadcast of fourth episode of The Power of the Daleks. The rebels try to use the Daleks; but the Daleks are reproducing…
26 November 1977: broadcast of first episode of The Sun Makers. The Doctor, Leela and K9 land on the planet Pluto, where the sinister Gatherer oppresses the people with heavy taxes.
26 November 1993: broadcast of first episode of Dimensions in Time, but we don’t talk about that.
26 November 2006: broadcast of Greeks Bearing Gifts (Torchwood), the one where Toshiko finds a pendant and is seduced by an alien.
26 November 2009: webcast of sixth and final episode of Dreamland.
Yes, the sequence seems very deliberately low-key, and no worse for it.