21 January

On 21 January, 1941, the "real" Captain Jack Harkness died in combat. (TV: Everything Changes)

In London, the ex-Time Agent masquerading as Jack Harkness failed to report for duty. According to a detailed search of UK records performed by Gwen Cooper's police colleague Yvonne, he was never heard from again. (TV: Everything Changes) The evening of 20 January 1941 was therefore the time when "Captain Jack" began travelling in the TARDIS with the Ninth Doctor and Rose Tyler. (TV: The Doctor Dances)

Behind the scenes

 * 1913 - Actor Heron Carvic was born.
 * 1938 - Actor John Savident was born.
 * 1967 - Episode two of The Underwater Menace was first broadcast on BBC1.
 * 1978 - Part three of Underworld was first broadcast on BBC1.
 * 1978 - Writer Geoffrey Orme died.
 * 1979 - Actor Kevin Wickenden was born.
 * 1993 - Actor David Blake Kelly died.
 * 1999 - Actress Leslie French died.