6 February 1965: broadcast of "Inferno", fourth episode of the story we now call The Romans, and nothing to do with the 1970 story of the same name. The Doctor accidentally sets fire to Nero's plans for Rome, and Nero decides to burn the city down. The time travelers are reunited, the Doctor and Vicki unaware of Ian and Barbara's adventures.
6 February 1971: broadcast of second episode of The Mind of Evil. The Doctor speaks Chinese, but the Chinese assistant attacks the American delegate to the peace conference.
6 February 2008: broadcast of Meat (Torchwood), the one with the icky alien source of, well, meat.