i) births and deaths

5 January 1929: birth of Norman Kay, who composed the incidental music for An Unearthly Child (1963), The Keys of Marinus, (1964) and The Sensorites (also 1964).

5 January 1988: birth of Mandip Gill, who currently plays Yasmin Khan on Doctor Who.

ii) broadcast anniversaries

5 January 1974: broadcast of fourth episode of The Time Warrior. Rubeish and the Doctor return the kidnapped scientists to the twentieth century; Linx kills Irongron and is in turn killed by Boba Fett Hal; and his spaceship explodes on take-off, destroying the castle.

5 January 1980: broadcast of third episode of The Horns of Nimon. The Doctor and Romana discover the source of the Nimons' energy, but Soldeed catches them.

5 January 1982: broadcast of second episode of Castrovalva. Tegan and Nyssa jettison a quarter of the Tardis rooms, and bring what's left to Castrovalva.

5 January 1983: broadcast of second episode of Arc of Infinity. Tegan goes to Amsterdam to find her cousins; the Doctor is apparently executed by the Time Lords.

5 January 1984: broadcast of first episode of Warriors of the Deep, starting Season 21. The Tardis lands in an undersea base in the year 2084, and is caught up in human Cold War politics and the rise of the reptiles.

5 January 1985: broadcast of first episode of Attack of the Cybermen, starting Season 22. The Tardis lands in London, where Lytton is doing something sinister; meanwhile on Telos, something else sinister is happening.

5 January 2020: broadcast of Spyfall, Part 2. Having been separated from her friends, the Doctor must figure out a way of stopping the Kasaavin and a familiar foe before their plan is put into action. Can she reach her friends and save the world with only a sonic screwdriver to help her?