7 December was a date.
A calendar showing December 1986. (TV: The Tenth Planet [+]Loading...["The Tenth Planet (TV story)"])
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Events
In 1952, the Third Doctor and Sarah Jane Smith, then being assisted be former adversary Tommy Ramsey, turned back a Xhinn advance invasion fleet. The cost of victory was, however, high, with many ordinary Londoners losing their lives. (PROSE: Amorality Tale [+]Loading...["Amorality Tale (novel)"])
In 1972, the last Apollo moon mission, Apollo 17, launched. The mission took the photograph known as The Blue Marble, which showed the human race how small their world was in comparison to the universe. (PROSE: Time Traveller's Diary [+]Loading...["Time Traveller's Diary (novel)"])
Other
According to a calendar on the Snowcap base, 7 December 1986 was a Sunday. (TV: The Tenth Planet [+]Loading...["The Tenth Planet (TV story)"])