25 March 1920: birth of Patrick Troughton, who played the Second Doctor from 1966 to 1969 and returned on various occasions. He would have been 91 today.
ii) broadcast anniversaries
25 March 1967: broadcast of third episode of The Macra Terror. Jamie and Polly are made to work in the pit, while the Doctor tries to analyse the mysterious gas.
25 March 1972: broadcast of fifth episode of The Sea Devils. The British government attempts to organise a nuclear strike on the Sea Devils.