Mexico City was the capital of Mexico. It was located in central Mexico. (TV: The End of Time [+]Russell T Davies, Doctor Who Christmas Special 2009 and New Year Special 2010 (BBC One, 2009-2010).)
The 1968 Olympics was held in the city. (TV: The Underwater Menace [+]Geoffrey Orme, Doctor Who season 4 (BBC1, 1967).) Iris Wildthyme and Panda visited the city on the day of the Olympics' opening ceremony and had an adventure with Señor 105 which involved spirits possessing piñatas. (PROSE: Iris Wildthyme y Señor Cientocinco contra Los Monstruos del Fiesta [+]Error: Code 2 - no data stored in variables, cache or SMW.)
Harry Sullivan and Radcliff traced the Egg of Abundance to Mexico City, among other places. (PROSE: The Man from DOCTO(R) [+]Andrew Collins, Short Trips: Companions (Short Trips, 2003).)
A map showing the location of Mexico City appeared on a screen a UNIT HQ in Geneva. (TV: The End of Time [+]Russell T Davies, Doctor Who Christmas Special 2009 and New Year Special 2010 (BBC One, 2009-2010).)