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 'other' Ninth Doctor in Scream of the Shalka (2003) and the Tenth doctor in The Curse of Fatal Death (1999).
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.