One of the most iconic planets in all of "Star Trek," Spock's homeworld of Vulcan, got a name change. Vulcan first appeared in the "Star Trek: The Original Series" Season 2 premiere, "Amok Time," which aired on NBC in 1967. The planet went by this name until "Star Trek: Discovery" Season 3 debuted on Paramount+ in 2020. This was seen in the 2009 "Star Trek" movie, where it was the inciting incident causing the alternate timeline that the Chris Pine-led films take place in. It's referenced again in "Star Trek: Picard."