Star Trek: The Next Generation

Time's Arrow (2) - S6-E1

Corrected entry: An aged, white haired Samuel Clemens angrily accuses Data and Guinan of introducing future technology that will corrupt the late 19th Century, and he threatens to expose them to the authorities. The elderly Clemens is thus portrayed as extremely paranoid of future technology. In reality, even before his old age, Samuel Clemens LOVED new technology, the more exotic, the better. In real life, Sam Clemens owned one of the very first telephones and the first typewriters, and he appeared in a Thomas Edison film when moving pictures were still in their infancy. In real life, Clemens was also a personal friend of Nikola Tesla, and he was known to visit the inventor's laboratory to marvel at all the truly futuristic technological wonders.

Correction: Worried about future tech being revealed doesn't make Clemens paranoid of future tech. He's just worried that Data & Giunan could change history by revealing it. These are 2 different aspects of his personality and one doesn't have anything to do with the other.