Upon his return from a journey through the Guardian of Forever Kirk realizes that history has been altered and no one remembers Spock. An Andorian is now his First Officer and it appears that Spock met an untimely death during a childhood ritual on Vulcan. Spock must use the Guardian again and return to the Vulcan of his youth and restore his time line.
Did You Know?
The view of Spock's hometown, Shi'Kar, in this episode has been added to the background in the remastered version of the original series episode "Amok Time". See more
When Kirk, Spock, and Lt. Erickson return from observing Orion's past, the crew does not remember Spock. Only these three do. However, Kirk says several times that he's the only one to remember Spock; he neglects to mention that Erickson does too. (Erickson was in the briefing room researching why Spock's existence has been altered.) See more
Do you think I'll ever be able to do that neck pinch as well as you?
I dare say you will.
Referenced in Star Trek