27 November 1918: birth of Peter Tuddenham, who was the voice of the computer in Ark in Space (1975), the voice of the Mandragora Helix in The Masque of Mandragora (1976), and the voice of the Brain in Time and the Rani (1987). Blake's 7 fans remember him also as Orac, Zen and Slave.
27 November 1935: birth of Verity Lambert, who was the very first producer of Doctor Who (1963-65).
also 27 November 1935: birth of Johnny Byrne, writer of The Keeper of Traken (Fourth Doctor, 1981), Arc of Infinity (Fifth Doctor, 1983) and Warriors of the Deep (Fifth Doctor, 1984).
ii) broadcast anniversaries
27 November 1965: broadcast of "Devil's Planet", third episode of the story we nowcall The Daleks' Master Plan. The Doctor, Steven, Katarina and Bret Vyon escape Kembel but land on the prison planet Desperus; as they take off again, a deranged convict holds Katarina captive.
27 November 1993: broadcast of second episode of Dimensions in Time, but we don't talk about that.
27 November 2003: webcast of third episode of Scream of the Shalka. The Doctor confronts the Shalka, who fling him into their wormhole.