28 February 1912: birth of Mervyn Pinfield, who was Associate Producer for Doctor Who from An Unearthly Child (1963) to The Romans (1965) and also directed The Sensorites (1964), Planet of Giants (1964) and The Space Museum (1965).
ii) broadcast anniversaries
28 February 1970: broadcast of fifth episode of Doctor Who and the Silurians. The Silurians release a deadly virus to wipe out humanity.
28 February 1986: broadcast of fifth episode of The Seeds of Doom. The Krynoid gets larger and larger, and the surrounding vegetation is under its control.
28 February 1981: broadcast of first episode of Logopolis; first appearance of Janet Fielding as Tegan Jovanka. The Doctor wants to reconfigure the chameleon circuit and gets sucked into a trap set by the Master, which also involves a passing Australian air stewardess.
29 February 1964: broadcast of "The Singing Sands", second episode of the story we now call Marco Polo. As the travellers press on through the desert, Tegana destroys their water supply.
Eight months down, four to go. In retrospect, this is a really mad project.