- Robert and Nancy Crater start their archaeological research on planet M-113. (TOS: "The Man Trap")
- James T. Kirk is romantically involved with Janet Wallace. (TOS: "The Deadly Years")
- Spock meets Leila Kalomi on Earth. (TOS: "This Side of Paradise")
- Dr. Roger Korby sends his last transmission from the planet of Exo III. (TOS: "What Are Little Girls Made Of?")
The following events occur in this year, according to the Star Trek Chronology:
- David Marcus is born to James T. Kirk and Carol Marcus
- The USS Enterprise completes its third five-year mission.
- Nyota Uhura graduates from Starfleet Academy.