5 May 1937: birth of Delia Derbyshire, whose arrangements of Ron Grainer's theme for the title music of Doctor Who were used on TV from 1963 to 1980.
5 May 1939: birth of Terry Walsh, stuntman supreme especially during the Pertwee era.
5 May 1957: birth of Richard E. Grant, who played the 'first' Tenth Doctor in The Curse of Fatal Death (1999), the 'other' Ninth Doctor in Scream of the Shalka (2003) and then Doctor Simeon/The Great Intelligence in The Snowmen (Eleventh Doctor, 2012), The Bells of Saint John (Eleventh Doctor, 2013) and The Name of the Doctor (Eleventh Doctor, 2013).
ii) broadcast anniversaries
5 May 1973: broadcast of fifth episode of Planet of the Daleks. The Doctor and friends infiltrate the Dalek base to prevent the bacteria release.
5 May 2007: broadcast of The Lazarus Experiment. The Doctor and Martha discover that Professor Lazarus' rejuvenation process is not what it seems.