Voyager's Tuvok has a storied Starfleet career that began in the 23rd century and continues into the 25th century.

When we first meet back up with Spock in TMP he is completing the Kolinahr ritual, which is just a fancy way of saying he’s purging all emotions. Then V’ger shows up and changes everything. Again.

Spock goes so far into Vulcan philosophy that he attempts to remove all emotion with the Kolinahr ritual—but it doesn’t stick. Spock makes the ultimate sacrifice. He dies to save his friends which he ...