Star Trek: The Next Generation, season 6, episode 1
Time's Arrow, Part II
Summary
The Enterprise crew follow Data to San Francisco of the 1890s. The crew deals with Samuel Clemens and runs into Jack London while trying to find a way to prevent aliens from interfering with 19th century Earth. Guest star: Jerry Hardin as Samuel Clemens.
Summary from Wikipedia, CC BY-SA 4.0.
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