Editing San Francisco (section)

===Incidents of time travel===
In 2286, Admiral James T. Kirk journeyed back through time to 1986 San Francisco in a successful effort to retrieve two humpback whales from the Cetacean Institute in the nearby city of Sausalito. (Star Trek IV: The Voyage Home) 

In 2368, archaeologists digging beneath the Presidio uncovered several artifacts from the late 19th century. Among several mundane artifacts was the severed head of Lt. Commander Data, which had been undisturbed for nearly 500 years. It was learned that Data and several of the USS Enterprise-D's crew had traveled back through time to late nineteenth century San Francisco in an effort to prevent the Devidians from draining the neural energy of Humans and disguising it as a cholera epidemic. While there, they met the noted humorist and prolific author, Samuel Clemens. (TNG: "Time's Arrow") 

The area of the city formerly designated Sanctuary District A was the location of the Bell Riots of 2024. In 2371, Benjamin Sisko, Jadzia Dax and Doctor Julian Bashir were thrown back to this time period by a temporal anomaly. (DS9: "Past Tense, Part I", "Past Tense, Part II") 

A temporal agent from the 31st century, Crewman Daniels, transported Jonathan Archer to the 2161 charter signing in 2154. Daniels attempted to use the event to elicit Archer's cooperation. (ENT: "Zero Hour")