Star Trek IV: The Voyage Home
Still on the planet Vulcan (where audiences last saw them at the end of The Search for Spock), Kirk, McCoy, Scotty, Sulu, Chekov and Uhura prepare to head home to receive their comeuppance for stealing the Enterprise and taking it to the forbidden Genesis planet. Spock, who has been recuperating from the fal-tor-pan procedure that restored his katra to his physical body, decides to accompany them so that he can testify at their court martial proceedings. But as their ship nears Earth, they receive an emergency transmission, warning all incoming vessels to steer clear of Earth. The reason: a mysterious alien probe has rendered all nearby ships and planetary defensive systems powerless, and is now wreaking havoc on the biosphere.
Human engineer living in San Francisco in 1986. As Plexicorp's plant manager, Nichols gave Dr. McCoy and Montgomery Scott a tour and then fabricated transparent aluminum to Scott's specifications.