The Vulcans have landed in Star Trek: Picard's 20th century timeline, and the reason for their presence is explained by Star Trek: Enterprise. When Patrick Stewart's Jean-Luc Picard found himself nabbed by the FBI at Guinan's bar, he perhaps didn't expect to be conducting an impromptu therapy session, but that's exactly what transpires in Star Trek: Picard season 2's «Mercy.» As a young child, the FBI's Agent Martin Wells (played by Star Trek: Voyager's Jay Karnes, incidentally) experienced a terrifying forest encounter with a Vulcan, mistaking a Mind-Meld for some kind of mental assault. Agent Wells has wanted to believe ever since...
Assuming Wells is roughly the age of his actor, the future FBI Agent's random alien meeting would've taken place somewhere around 1980. This should be a year of Pac-Man and Dallas, not pointy-eared aliens lurking in a forest. Moreover, Star Trek: First Contact established the first official meeting between Earthling and Vulcan occurs in 2063 — almost a century before Agent Wells' flashback in Star Trek: Picard. What in the name of all that's logical are Vulcans doing on Earth so early?
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An answer can be found in Star Trek: Enterprise — specifically season 2's «Carbon Creek.» In this episode, the NX-01 Enterprise's Vulcan science officer, T'Pol, reveals her grandmother was sent to survey Earth following the launch of Sputnik 1 — the planet's very first satellite — in 1957. The Vulcan team crashed on Earth, and spent a few months living among the humans in secret, making full use of long hairstyles and beanie hats. One of these Vulcans — a male named Mestral — even stayed behind after T'Pol's grandmother and the others were
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