Star Trek: The Next Generation (1987)

S5E26 Time's Arrow (1)

Stardate: 45959.1. During an archaeological excavation on Earth, the head of Data is discovered, along with indications that extraterrestrial beings may have visited the planet as far back as the 19th Century. To explore this intriguing lead, a team embarks on a journey using advanced technology, traveling back to the late 1890s in pursuit of answers alongside Data.